I really disagree, EQ was a forced grouping completely grind based game with heavy penalties for death and a leveling curve in which you could level every single class in WOW to 80 before you would max level a single EQ toon not even including AA points. You played in 1 giant world where the players dictated what you could and could not do. Questing was not in any way shape or form a signfigant portion of your played time.
WOW was completely quest guided, easily soloable to max level with every class (though some specs may have a little trouble/slowness). In fact solo or duo questing is by far the fastest way to play the game until you want to endgame instance/raid. Nearly everything you want to do is instanced and readily available, players have no control over limiting what you can do, quests provide you with all the gear you need.
Saying WOW is the EQ mold is like saying Rainbow 6 is in the same mold of Doom. Sure you're pointing a gun and shooting at bad guys; but it's hardly the same game.
That's not to say I would'nt love to see completely fresh genre-busting ideas in the MMO space, but complaining that specifically classes\grouping\questing\leveling are in an MMORPG is asanine. The vast majority of large MMO games have a pretty signifigant differences in systems and target market (casual, hardcore, pvp, pve, etc.). It very much parallels the differences between run and gun, tactical, squad based, arena, story based or online focused fps. Sensible people dont go into fps threads and bitch that the game sucks because it has guns, bullets, and a first person perspective. They discuss the stuff thats important to fans of the genre: art direction, frames per second, weapon variety and feel, level design, netcode, story, sound, etc. Which are all the same type of things that seperate MMOs from each other.
Also let's not forget that most of the big publishers all have at least 1 or 2 major non traditional MMO bombas. Sony (EQ series) has Planetside and Pirates of the Burning Sea. EA (WAR\DAOC\UO) has Motor City Online (i think thats what the racing mmo was called) and Earth and Beyond. NC Soft (Aion, Guild Wars, Lineage) has Tabula Rasa and Auto Assault. It's not like new stuff isnt being tried; people just happen to like working together, having an humanoid avatar, leveling up, and collecting loot.
The other big obstacle to radical changes to the formula is simply technology and bandwidth. If you want people to pay monthly for your game, it better compare favorably in core gameplay and be somewhat close in graphical prowess to the nonmassive versions of whatever genre you are emulating. Noone wants to pay 15 bucks a month to play a janky ass shooter, action game, or racer with bad graphics just because the world is persistent or they can do it with more people on screen at the same time. And technology isnt really to the point that we can just throw a permanent world and 2000 people per server into COD4\Forza\Ninja Gaiden, whereas we can do disguised turn based rpg combat in a large world (which even then normally crashes when we stick too many people in close proximity).