I like this idea myself. I wouldn't mind having population on both capital worlds instead to make them feel more "alive". Players can congregate in the square, the Senate tower, or in the cantinas like in SWG ( though the Coruscant cantina is woefully tiny ).
But then the devs would have to figure out how to deal with the holocrons, access to The Esseles and Black Talon, other things. So this is unlikely to happen in the overall picture.