I don't think its a good idea.
1.) It takes lots of resources which could be used in better ways
2.) 3D space combat is a complete different game. I don't see the benefit for TOR
3.) Only a small number of players will be interested in such a feature. 3D space combat is much too difficult for most of the players.
I disagree. While it is a completely different game, I see that as an awesome thing. This is an MMO and the more variety it offers, the better. If 3D space combat is like Rogue Squadron, it will be so amazing. I will be engaging in that so much.
Games like Rogue Squadron are also very popular so I dont see why you think people will not be interested. Especially Star Wars fans.
God I hope this is true.