I haven't tried playing as an imperial yet so I'm not able to comment on the state of that particular environment, but the republic hub is somewhat lacking, I find.
The central area, where the cantina resides, is reminiscent of a giant night club. I don't understand what sort of message this is supposed to be conveying but it reminds of that scene in teenage mutant ninja turtles, the movie, where the newly recruited foot soliders are attempting to pacify themselves with distractions by way of games and music. It is not the sort of environment you'd expect to find within the bastion of hope that is the republic fleet.
The typical Star Wars space-based locale was made evident in the original trilogy, just look at the internal areas of Star Destroyers and any other large vessel on-screen. They are sterile, compact environments, devoid of clutter save for a few exceptions. The space we have is too large, it should be smaller - and you should have seen this.
Look at Coruscant spaceport, although it's based on the planet, that would be a preferable visual style to what the current Carrick station looks like.
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We have to cope with this for hundreds of hours, it's too much on the eyes and the cantina music just grates on one's nerves at times. Slowly eating away at patience, that's all. ;]