I've got Ctrl-Shift-Slash that runs cmd or powershell (depending what's installed) on all computers I use. Come on, there are things you do faster in command line, even in Windows :) To be on topic - as a power user, I try out every new Ubuntu and Windows version that comes out (MacOS doesn't give free versions to run on regular PCs, sorry ;) and I can say Ubuntu is having way less problems with every release. However, with every release, it says one thing to me: there's software for almost all of my needs on both Windows and Linux, both can manage my hardware pretty good, so... why switch? :)

And without the risk that if you enter an unlabelled CD "to check what di you record there 6 months ago", a game installer will popup, consuming a lot of your RAM and time.

I would say these are the new features added in post-beta, not bug fixes.