I wouldn't mind something like a Boss Rush mode for dungeons, but otherwise they're one of the main avenues of the game where AoE damage is relevant, so removing trash would really make a large chunk of each class's toolkit largely worthless. And seriously, tons of the AoE skills in this game are great fun (Deathflare, Flare, Elixir Field, and so on).

Overall, they're still the content where I have the most fun. I just wish we were still getting three per patch instead of two per patch because the content we've gotten in the trade-off hasn't been worth it so far.