One thing we can say about Everquest 2 is that it has known many changes and updates over the years and continually tries to stay on top of what gamers want. There's many out there eager to sell you on the evils of SOE and sometimes I'm one of them, but one thing that does very much strike me and has done so for years is the attention given to player feedback in their community forum.
Sure sometimes in game surveys that are given are really just courtesy and it doesn't matter what the populace votes when they already have firm plans of doing something. Which may or may not suck to you according to your point of view. But one thing we should always try to remember is that it doesn't matter how passionate you are about the game, it's not YOUR game it's SOE's (or insert company) and ultimately they have the first and last word. However if you pay close attention to the updates over the years there's a substantial amount of them that come directly from suggestion threads on the forums. I can't really think of another MMO that has done this at this level so far, maybe FFXI but Square Enix is just toooooooo darned slow to compete with SOE on that level.
A major gripe with a lot of people have always been the graphics. Someone or a group while developing the game misjudged which direction computer power would evolve and so the game just could not scale well with newer computers and no matter how strong your machine is EQ2 just ran about the same. With multi core support over updates in the last year has really helped in that department, but there are not stopping there! Incoming are new 3.0 shaders which will replace the 1.0 ones. Dramatically transforming shadows, contrast, lighting, reflections and so on. The really good news is that these shaders are small and lightweight and most of them are stored on the GPU instead of the CPU which means the game will not only look tons better it will run better as well. How exciting is that? Personally I feel like I'm an extreme sugar high. :D
Other things mentioned that are a priority for beautification are hair models for characters should we start prayers for the affectionately named play dough styles right now? Perhaps grass will have more toggles to control height so your halfling or fae doesn't keep getting lost and running into trees. But most importantly and totally trumps these things are SLI/Crossfire support, HDR support and general optimization.