That planetside thing sounds good but it wont work.
FPS MMOs just dont cut it today, given that people get the same leveling positives from games like BF2, also balance would be such a huge problem and server lag would be massive if you using those sorts of graphics.
Also vast majority of MMO players dont want mega high graphics as it useally means bad performance.
Back on topic though, issues with game i see as current are:
No UI mods a huge issue
Animation problems/delays, again a huge issue if not addressed asap.
LFG system, not a huge issue but in my server it pretty dire atm with people and instances.
Currently biggest issue i have with game is lack of "drop in and play" ability.
Maybe this due to my server, Dxun battle server or could be just my feel but i actually like to meet and play with other players without the chains of a guild.
By this i mean public quests, a focal point of meeting other players during the useally very lonely questing of a MMO, it makes a change in game pace and surely makes it more enjoyable to just group up with random people in your area and do a "heroic" quest and such.
Currently it seems everyone is just farming up levels ASAP reach 50 then pvp.
There seems 0 fun in grouping with random people atm and for me it rather a boring game if all you doing is solo questing, i may as well play skyrim .
Again, might be just my server but i dont feel like i playing a massively MULTIPLAYER game, rather than a singleplayer game with the odd connecting to internet for a couple of player vs player matches.