That stinger is a massive improvement, Gok!
But I have to say that I'm a little baffled as to why the paint keeps getting brought up otherwise. I get that there are little things like the roofrack lights but it hardly makes or breaks the figure to me. Unlike most Studio Series Bumblebees the entire back Window is painted as opposed to left clear and they even bothered to paint red taillights over the black and coloured in the wheel arches. Of course, it also has the obligatory black stripes as it should too. So it doesn't really seem lacking over any other Studio Series Bee I have, stinger aside.
I get that it might not be as painted as it could be, but calling it "poor" feels like a real stretch. It's not really much worse than most Studio Series releases.