I think that's where the pain lies, when you run into a wall it hurts.
I guess these are teething issues. I'd like to know what GTK3 does bring to the table?
I get video flicker in games under Gnome Shell, and I've had flickering issues with video under Unity (11.10) on an Intel GM45 and Nvidia 6200 respectively. I crashed Unity in about an hour and made my desktop inaccessible the last time I used it. Unity 2D wasn't that bad, but some elements of the UI didn't gel well together at all - dialog boxes that are out of place etc.
The sad thing for me, is that I remember seeing Compiz for the first time. And there were elements and plugins that I really liked about it, and it felt like the desktop was moving forward. I was hoping that Gnome Shell would take the best bits of Compiz - but really get to the point where it would manage my desktop for me . But I can't say it brings me anything.
The negativity is just a case of sour grapes. We'd prefer to see the free desktops outdoing their commercial cousins. OSX10.4 Tiger is a pretty good benchmark to beat. And that's a 2007 OS.
It would be nice to see a Desktop OS competing with Android, W8 and the iPhone though.