Still waiting for the impossible MMORPG where the dev team went through pretty much every feature of WoW and asked themselves "Can we make that completely different without making it way more inconvenient?"
From the "simple" things like making up a completely new fantasy world without magic-resurrection-for-great-plot-convenience-and [http://tvtropes.org/pmwiki/pmwiki.php/Main/GameplayAndStorySegregation]-horrible-headaches-during-supposedly-dramatic-cutscenes, dragons, dwarves or elves or " by a different name" (the creativity is there, find the right people!) to more complex things like the combat mechanics (tho a start would be to try find a mix between fighting and something different (that doesn't involve grinding, which I realize is tough to do because nothing stretches MMO playtime as well as grinding) like the puzzles HL2 throws at you or the AC climbing sections). Or just for once don't give items stats and just let the players wear what they think look pretty (of course you get the golden armor later in the game than the tattered underwear).
Bring back the "fantasy" in "fantasy".
If an MMO sticks out these days and doesn't try to ride on WoW wave and deliver a cheaper service or something, it usually only puts one or two twists maximum on the existing mechanics and more often than not those twists aren't used to their full potential and have been forgotten by the next week. They're literally just "farts of creativity" that were produced to have something to answer when asked what makes it different from WoW.
Does anybody actually believe anymore they can be better than WoW by cloning most of it?
But like Extra Credits has already made depressingly clear, no big developers would spit out money for a daring and crazy project, and even the Indie scene isn't a guarantee good and fresh ideas make it out there.
I'm sorry, mates, you all know that crap, I just always get so frustrated when I see unused possibilities, like how all kinds of games try to be "realistic" (and always fail, because at the end of the day you'll still heal by having a good meal/potion or waiting behind the corner) when there's so much room for artistic stylization and fun without capping the target group at the age of 6 or making the game shallow or stupid.
Just needed to vent.