First, thanks for quoting that, because I discovered a typo.
Second, any pressure for a releasing the game when they did came from the publisher hearing the same complainers on this thread about a release date throughout 2011. There's always dialogue between developers and publishers before a game's release. The developers want to put out a complete product, while the publishers want to make sure the game releases in a timely fashion in order to maximize profits.
What happened with SWTOR's release was their attempted balance between the two. Was it perfect, no. Is any MMO launch perfect, no. Have they been busting their asses trying to improve the game, absolutely. Does improving the game involve holding some features back until they are ready, absolutely.