In order.
1) A little.
2) No because they already did that. But I miss original Nick Fury a little bit.
3) Yes.
4) No.
5) I don't know what race Candice Patton is or what race Iris West is supposed to be, so I cannot answer this question.
6) A little.
7) No.
8) Yes.
9) A little.
10) No, not just Zendaya. I also find Guy Pearce and Ben Kingsley in IM3 to be dumb (even though Kingsley delivers a great performance), Michael B. Jordan in FF to be silly (who is great in apollo, no so much in this), and Tilda Swinton as "The Ancient One" to be absurd (still looking forward to it).
I admit that I care more about characters I care about. Will Smith doesn't bother me as much because I don't care about Deadshot at ALL and I like Will Smith. Heimdall seemed weird because of the Norse blonde white viking image. Fury bothers me only a little because I don't see the Ultimate verse as an adaptation. I have no justification for Liam Neeson as Ra's Al Ghul. My only real experience with him prior to Begins was the Animated Series though, where skin hues were kinda the same between him and Batman, so I suspect my perception was ultimately colored by that.
I will say something like The Wiz or the Broadway play Hamilton don't bother me, because those things are quite different. But that's not really the case here.