I guess im missing why he is that great. I understand that tactics is despirate for will power, but a +1 is not THAT amazing. People keep saying he works really well for mono-sphere decks, but it what format? In a solo game, +1 will to each hero isn't that useful, when you really need your heroes available to do all sorts of tasks. At most, if you have allies available to do your combat, he's granting a +3 will power. I think you're still going to need to bring legolas along to make quest progress, and that means really, thats only a +2 since legolas wont be questing. Thats assuming you don't need one of your heroes to play attacker/defender.
In a multiplayer game, he's slightly more useful, assuming people are splashing tactics into their decks, but even then, how much tactics do you really need before you can say he's worth his 12 cost? If it was all tactics characters, or tactics characters + rohan characters…
as it stands, i can't see that he's the god send people say he is. But i'll reserve my true judgement for when i get to see what other cards combo with him.