1) Ability to Marry other players with a semi-detailed wedding at a stronghold maybe...
2) Ability to move your decoration hooks where you wish and add new ones
3) Crossover expansion, ability to chose to switch sides from republic to empire or vice versa by a certain level
4) Pazaak gaming
5) Ability to click the chairs in your stronghold to sit down
6) Multiclassing
These are all things I would like to see added and would very much improve the gaming experience in my eyes