It is quieter than I would like in-game. At any given time, whatever level, it can be very hard to find 3 other players to put together a balanced team for a dungeon/flashpoint. Doing heroic quests can also be challenging...not because the mission itself is challenging, but finding another person with whom to do it is challenging. I think a server merges is a very good idea.
The other idea is one I really can't understand why it isn't implemented. It would almost entirely eliminate the "population" problem and the faction imbalance problem. I understand why Republic and Sith players are kept wholly seperate..because WoW did it that way, and WoW is successful. Well it's a stupid, needless feature. WHY can't player's from either faction enjoy PvE content with each other?
In Eve Online, an Amarr can play with a Caldari. In Age of Conan all factions can play with each other. Same in Fallen Earth and many others. In City of Heroes/Villains, games which are quite seperate allow opposing factions to join together for certain PvE content (and since Going Rogue, even SWITCH SIDES!).
The Faction restrictions may make sense from a story perspective I'll grant, but from a gameplay perspective it is frustrating and needless. If we could play with each other in PvE there would be significantly more content, more players, more players of an appropriate level to team with, more chance of finding tanks/healers as needed, etc.
The other feature I wish the game had and cannot understand why EVERY MMO doesn't have it, is CoH/V's Lackey/Sidekick system. This allows players of any level to play with other players of any level and get level-appropriate rewards. I appreciate that in a story driven game this isn't an easy thing to implement as is. However, it would mean that as a max level character I can join my low or mid-level friends for dungeons without crippling their XP gain, with a challenge for myself and so on. This results in...more players to team with and the ability to join friends whatever level they are.
We could have a larger, functioning economy rather than the pathetically understocked trade house atm, more content, more players to enjoy said content with and still enjoy the inter-faction battles, stories and PvP.