So, as F13 is just behind the door I have it installed, but I don't use it as my primary system as there are some regressions (which I'll maybe talk about in some other blogpost) that keep me out, I've decided to give gnome-shell another shot. This time I've been able to put up with it for about few hours, but there are certainly improvements. First of all, the design is definitely much better, and the ugly glowing blue something is replaced by more-slick-than-not button-like rounded rectangles and the overall feeling is better.
On the flip side, when I focus a task (under which I mean equivalent to virtual desktop), it still is equivalent to focusing a window which is IMHO totally wrong. E.g. when I type a mail message I occasionally need to switch to main evolution window (in which I navigate using mouse), which however buries the new message window so deep that I need to either alt-tab to it (can take some mind-processing time, especially if there are more windows on the desktop) or zoom out and select the new message window. There also appears to be no fast way to switch between tasks. Again I either need to use the suboptimal alt-tab or zoom out. Basically these two things are the main killers for me using gnome-shell. But it bugs me — am I the only one who under 'task' usually means more than one window? E.g. a task that you could call programming for me usually means that I have either gedit or eclipse window open, one or two terminals and nautilus among which I frequently switch and furthermore I often switch between this task and 'net surfing' task (API references, tutorials, etc. are usually in (X)HTML format)… Gnome-shell make this type of workflow especially painful.