Unity is coming along nicely, but it still has a lot of ways in which it needs improvement. what are some of the things that you think need to be done to make it the best interface the universe will ever know.
For me the biggest problem I have with unity by far comes in the form of task switching and workspace switching, both of these feel clumsy to me. for instance thanks to grouping I have to click three times to get to the important firefox window I want, once to select the group (which will open something useless like the downloads window) again to initiate the 3d window picker, and then from there I need to look and visually identify which one I want and click on it again. I would MUCH rather just have half a dozen firefox (or whatever) icons and be able to just click on the one I want.
Another thing I would like to see is official support for the desktop cube, it seems to mostly work already, so this should be an easy win, all you need is better integration of activating it (workspace switcher, actually middle clicking on the launcher would be my preference). the consistent problem with all implementations of the cube have been how to activate it and the best solution I have found is 'go to the edge of the screen and middle click'. with the cube in this setup all you have to to is move your mouse to a screen edge, hold the middle mouse button down and move around to see which workspace you want, let go when you find it.
More compiz plugin support (the extras package, or some subset of it, would be nice). It would also be nice if you could grace us with different wall papers on different workspaces, I have waited SO MANY years for this, the gnome people always blew it off.
pie in the sky wish; widgets. real ones. KDE's plasma widgets are a great example of what I would like to see.