So, I have been absolutely loving this game again after Lost Realms and Treason of Saruman. The six quests are probably my favorites of the entire game. I have also been loving the new player cards. I'm writing this post to tell everyone to calm down; the Ents are definitely not overpowered.
Here are some reasons why:
1. It is very hard to have any overpowered cards in LOTR as it is a coop game. More powerful cards don't mess up any metagame because there is no metagame. Power cards just make the game easier, so when you are saying that a card is OP, you are just saying it makes the game lame or boring. So far the only cards that have done that have been the infinite loop combo cards, as well as the dwarf trader guy and other cards that just needed caps, which have all been nerfed. (You might also be complaining about power creep and old obsolete cards, but I will get to that.) Even if Ents are SO powerful, they just make the game slightly easier, but... not really.
2. It is very, very hard to make a unique card overpowered because unique cards make your deck more inconsistent. Either you run 3 copies and end up with dead cards in hand or you run 1 copy and see it less often. The two most powerful Ent cards are Quickbeam and ally Treebeard, both of which are unique.
3. Specialized cards trump well rounded cards pretty much every time. Eowyn is still one of the best heroes in the game because she only quests and she is awesome at it. There are a glut of 2,2,2 heroes like Faramir that hardly ever get used because it is difficult to justify paying the extra threat cost when most characters can only do one thing each round. The thing about Ents is that they are all well rounded characters, which means most of their stats are left unused. The Wandering Ent, for instance, ends up mainly being used to quest, which means that basically all you are paying for is 2 resources for 2 willpower, hardly overpowered. The exception to this might be ally Treebeard, because he can ready Ents, but he readies 1 Ent every 2 rounds! Do you realize how underpowered that actually is? He basically always readies himself because he has the best stats, and it is slightly helpful, but nowhere near overpowered.
4. The, and I mean THE hardest part of every scenario is right at the beginning. As the designers get better at quest design this is starting to improve, but basically in 80% of the situations you have to stabilize the board position as quickly as possible, and once you do the quest is actually pretty easy. This means that Ents are often dead cards. Either you can't play them because they come into play exhausted, and thus it is too risky, or you don't bother to play them because you already have the situation under control, in which case you can win without them. Honestly, this is not a minor thing. I was playing with Ents for a while and I stopped because waiting a full round to use the Wandering Ent's 2 willpower was so slow I would rather just build a blue rohan deck and actually beat the scenario.
5. Group buffs always trump individual characters. Rohan has been around since the beginning and nobody thinks that it is overpowered. Well, why am I having more success with Rohan than with Ents? The answer is that Rohan has effects that help the entire tribe, like Astonishing Speed, which is more OP than any Ent card. Have you guys played with Eomund? The guy is amazing! He is like a chump blocker with a Lure of Moria effect built in. Even if you exhaust everyone to quest you can often kill him with archery damage, depending on the quest. They guy is outstanding. There is nothing even close to that with Ents. Cards like The Sword that was Broken and ally Faramir are more OP than any Ent. Would you rather have a bunch of underpowered allies with tribal discount and group buffs, or a bunch of individually overpowered characters with nothing to benefit the group? To me, the answer is obvious. Ents are not overpowered.
6, So, what we are really talking about here is 2 cards, Quickbeam and Treebeard. If you compare Quickbeam to Veteran of Nanduhirion then I can understand being upset, but remember, Quickbeam is unique and the veteran is a dwarf who benefits from things like Dain Ironfoot. I mean are we starting to think that a dwarf is underpowered? Speaking of underpowered, a lot of the cards that can be compared with Ent cards have always been underpowered, so... Quickbeam is really, really good, borderline overpowered, but I stress borderline. To me that is exactly where Ents should be, in order to capture their flavor properly. The exhaustion drawback is so severe on the other Ents that they can have the massive stats without being overpowered. It is fun to have one card that circumvents that, but without group synergy, it is nothing to be worried about (again, reflecting their flavor). When Treebeard is compared with Radagast, then he looks overpowered as well, but again, Radagast was really underpowered, right? He was underpowered when first printed, so this isn't exactly powercreep. To me, Treebeard is solid and strong, but not OP.
7. Old cards can be given new life. We can see this with the new spirit Theoden, who is amazing. The underpowered Rohan tribe just got a huge boost and it puts it above Ents on the power scale, even though Ents have much better cost to stat ratios. This trend can simply continue. In this way, even if powercreep is happening on some level, the old cards are not obsolete. As a result Ents are not really "overpowered" after all.
8. Treebeard the hero requires a ton of deck space to be good. Maybe you think hero Treebeard is OP. The only way you can think this is if you haven't played with him yet. Once you play with him you realize, it's not a big deal. You see, you can make Treebeard really good with Ent Draught and Self Preservation, and Lembas and all that, but the problem is that whenever you include one of those cards that means you are not including an ally. That means that Treebeard has to do everything himself and if you run out of effects to ready him, then he is only a slightly above average hero. Think about it like this, Self Preservation is a 3 cost card that gives 2 attack or 2 willpower. When you think about it like that, it isn't so impressive is it? Eventually Treebeard gets overworked and he has too much damage and you can't boost his stats anymore, then your decks lack of ally support starts to catch up with you and even Quickbeam isn't enough to save you.
I've been playing this game since day one, before Hunt for Gollum was released, and I have seen people complain about Dain, and about Spirit Glorfindel, and about Outlands (I tried playing with the "overpowered" Outlands and all I did was get destroyed, so I don't know what that is all about). To me, Spirit Glorfindel is too good because he is in every single deck, mainly because his threat is low so you can combo him with power heroes (and because Light of Valinor is a bit ridiculous). To me, Dain is fine because there are almost no purple dwarf allies making him useless in solo. Most dwarf synergies operate on the 5 or more rule, and Dain needs to be ready, so its just awkward enough to work. Outlands is squishy. Yet all these other effects are easily more OP than Ents. So everyone needs to calm down and play on.