First off, lets say that this game is doing very well. I enjoy the story based quests, the PvP, the world, crafting, and the flash points. Obviously the game has some issues, but I won't address any of those. I think the rest of the forum posters do plenty of that. These ideas aren't necessarily in order of priority.
#1 Space combat - a second MMO within a MMO.
As it exists right now space combat is a fairly decent mini game that you can do as daily quests for some cool stuff. What space combat is and what it could be however could truly make this game stand out far above the rest. (no pun intended) If they flesh out space combat to be a PvP system with customizable ships and unique rewards and gear you'd have something that could be very unique and special to MMO gaming.
What I'm envisioning are space combat PvP warzones with escorts, defense/assault, and pure dog fight engagements. I don't want to have just simply player versus player. I want to have PvP with computer controlled units joining the fights that provide additional support and targets for players. It also makes for a grand fight with the huge space battles we love to watch in the movies.
Within the space combat portion of the game would be ships you could buy, customize, and truly make your own. (Don't get rid of your "rental" ship) This would be secondary to the other part of the game where if you choose to not participate in space combat you would still keep your rental ship you earn at the end of the intro quests. If someone wants to become the greatest pilot in the galaxy, rather than the greatest healer or tank, then I say this game has what you want!
The system all ready exists it just needs to be greatly expanded and fleshed out to be made a true multi player experience.
#2 Expanded open RvR experience.
We all know that Ilum isn't doing so great right now, but I believe if they made it more like Starwars Battlefront that it could be a much better system that population imbalance could be absorbed a little more easily. Now people don't love fighting NPC's when they're supposed to be fighting players, but you can't guarantee that there will be players present and if they are it'll be equal.
I'd like to see a zone where you can control of it by killing NPCs in battle, players who are worth more, and objectives that can be taken that are worth the most. The side with less players get NPC's that are more numerous and slightly stronger than the other side to even the fight out. I'd also like to see siege weapons and vehicles both player and NPC controlled.
#3 Random flashpoint finder
I like the "hub" at the fleet, but lets be honest this will come eventually and will be well received by most players. PvP probaly could use server groups as well. There isn't much to add, except that it's a needed feature imo.
#4 Continued Story lines, flashpoints, operations
This is obvious and we all know they are working on these things, but need to be continually added.
What other content or updates to current content would you like to see?