i am experiencing none of that. since beta 1 (maybe 3-4 days in), i have been working as always, getting everything done i need to get done. the GUI is just... there. and, outside of a few minor bugs, nothing has been problematic.
am not saying ppl aren't distracted or challenged by the OS, but i also wonder if some ppl are overthinking things, looking for stuff to complain about (it's just a theory! nothing more).
anyway, for some there are issues, for others... not. anyway, am grateful to be a macuser who adapts quickly to 'the new'...