I think everyone that is following SWTOR knows BioWare are trying to make this game one if not the most polished mmo's on the day of release.
This dev blog gives a small insight on how committed the BioWare are in bringing that polish. From the screens below we get to see the changing face of the game, from the input the writers give to the rest of the development team.
We have two different planets Nar Shaddaa and Corellia. The writers also let you in on what inspired these planets. It's an interesting read and the before and after screens are a huge testament on how important this process is.