Of all the replies, this is one of a very few who hit the nail on the head.
BioWare has (had) a reputation for making good games. But on this one they've seem to of dropped the ball on many occasions.
This is something that was not a priority. There are so many other things that have greater necessities than making the scenery greener.
BioWare. I just don't know.
It's because EA got their greedy little fingers into BW's part of Star Wars.