More broadly, I'd like more support for secrecy and tricksy ways to deal with enemies, ideally themed so that it doesn't clash with hobbits (A Elbereth Githoniel works, but not Ride Them Down). During the Grey Company's book club discussion of A Shadow of the Past, they mentioned that it's unthematic that the quest essentially forces you to fight the black riders. Obviously it's tricky to balance powerful effects like A Elbereth Githoniel, but I'm hoping the sixth saga box (which we might get this year) will include some powerful events and attachments to support players who want their decks to be more focused on Frodo and Sam than high-threat heroes and an army of allies. I loved Staff of Lebethron and Taste it Again (and appreciated In the Shadows) from The Land of Shadow, and would like to see more cards like them.
I have often wished that the core game had come with an additional phase for sneaking and stealth. Perhaps sneaking past an enemy would keep it in the staging area, but would exhaust it to represent sneaking past it; exhausted enemies wouldn't make engagement checks, but could be optionally engaged, and their threat would be reduced by one, to a minimum of one. Exhausted enemies wouldn't ready in the Refresh phase; once you've managed to sneak past the enemy, you don't need to do it again. When a quest card is completed, exhausted enemies would be shuffled back into the deck. You could then have encounter cards featuring keywords that interacted with this mechanic, such as an Alarm keyword that readied all enemies in the staging area.
Obviously, it would need to be balanced (I'm no game designer!), and it would probably have called for an additional attribute on player cards, but I really would have liked to have had that option as opposed to always needing to charge in with guns blazing. I think the best that I could hope for would be player cards that had this effect on enemies in the staging area, but having it as a core mechanic really would have made the game feel more three-dimensional, in my opinion.
Ian's The Seat of Morgoth scenario?