I could be wrong, but I'm guessing in SR1 they are trying to fix everything that has been reported and confirmed as a bug, and the reports keep coming. Or maybe some of the bugs are proving to be very stubborn.

One thing I fear won't be fixed (because it's a design issue rather than a bug) is the fact that the GUI elements and text are too tiny for anyone who doesn't work on a laptop. Not just the library content icons, but scrollbars, buttons, parameter text, etc. Since 3D people tend to work on large monitors, this is a fairly significant issue. I also wish there was a way to change the dark grey interface. Too gloomy.