Now why would you do that?
A lot of these suggestions are limitless and some are really pedantic and incoherent, but on the other hand they do make valued points about what would be good in a story, what would be good eye candy, what would be good for combat etc.
*Hypothetically* If I was a dev for KotOR3 and I had to take all this into consideration, or just make the game free will think of what the fans would be like "Hey they didnt put my magical unicorn on Coruscant! WTF!"
There is quite a lot of things to take into account already, story for one thing would be very difficult, K2 left a lot of things out as it was uncompleted but still managed to feed us a bit about what happened, however it is just making the hole even bigger at some point they are going to have to answer us fans the questions we all seek in one game or another. Alternatively LA could just take the coward way out and not do it at all, and leave us hungry and thats what I see they'll do just 'forget' about it.
But then again, there are a lot of KotOR fans and this is a good franchise, so I dont think they'll overlook it yet.