Chat bubbles are a must, why they are not in the game I have no idea.
Too many instanced areas, I have to agree, although the story specific area are a must.
reasons to go back to planets, once I leave Corasaunt unless I have to go talk to a Senator or get a holocron I have no reason to go back there. Higher level areas for planets give the lower lvl people a chance to meet the higher lvl players and see what kinds of things they have going on. the space stations kind of do this but they are just way to much of a pain to deal with on a daily bases.
But the way the game is designed adding area to existing planets is going to be so much easier that it is in a sand box game so I expect to see more added content more offten. than with other games.