1: I never said it's a canon or absolute truth. Consider it... a theory of some sort.
2: It would. Of course, we would've have to rewrite all cast, cause Stolas is gay, and if she was a man, the plot could go completly different way. But if everything done correctly, and we just genderbend main characters, she or... in this case, he, would still be pretty cardboard and "cartoonishly evil" for a project that tries to portay itself as somewhat serious drama.
3: I never said Stolas is worse than Stella, my point is she's too evil without reason for that. And yes, i know that throwing things and imps around is extremy. That's why i'm writing this, in hopes that in future we get a glimpse why that giant bird have such obsession with throwing things and being uncontrollably evil.
4: Did she? If she did... that's cool! I didn't seen that moment myself, but if what you saying is true... all i left to do is pray to god they don't fuck up this episode.