Something that would be really convenient would be to allow us to have tabs open in separate windows and/or having multiple tabs visible at once rather than having to switch back and forth. In addition the ribbon interface is nice and it works but on high resolution monitors even the biggest menu doesn't take up half the screen.
Example:
http://i.imgur.com/fFzSIW0.png
This is on a 2560x1440 monitor. There's a ton of wasted space here. Also as a side note it's kind of annoying when you click out of the program to something else then click back in and it switches to the home tab.