Hmm. On their own I'm guessing a lot of collectors may not even consider some of those as issues at all. Imo most appear to be the usual casting/mold and paint differences. Ones that individually you'll probably find on many pieces given that these are hand painted etc.
That light bleeding is probably annoying, but it's not totally unexpected. On nearly every Sideshow piece that I have with a light feature that wasn't a lightsaber, has some sort of light bleeding. The R2-D2 is a good example.
But everyone has different tolerances for these sorts of things. I know that when I went from Hot Toys to collecting statues I had to lower my standards by quite a bit. I accepted it because the additional presence of such pieces outweighed the downsides.