I'm growing quite tired of MMOs with 50 different spells that you bind to qwert, 123456, shift+12345 etc.
I, personally, would loooove an MMO with a more action-RPG take on combat, where it's less numbers determining how much damage you take and more of an active approach to avoiding damage. (Guild Wars 2 is a start but it's still a keybind-MMO).
Would an MMO with Dark Souls combat work? I would personally love to play something like that.
We already know that you can have different classes because you "have" classes in Dark Souls. Just increase the number of spells for casters, while melee classes focus more on weapon attacks á la light and heavy attacks.
There would be more of an emphasis on self-healing (Think Bloodborne's blood vials), and that you are king of your own survival.
I think that the MMO genre is stagnant, and need some new ideas. I understand that keybind MMOs are working, that's why they are still here, but there MUST be a way for alternative combat even in this genre?
For some more extreme thoughts, imagine an MMO with Devil May Cry-style combat.