I would. I'm not white but I'm not of the camp believing that changing a character's race isn't a big deal. Moreover, if they did then most likely he would be changed to black - instead of another minority and that would annoy me even more considering there are plenty of black superheroes in the mcu and changing peter to be black would mean there would be two black spidermen in a single continuity, while the whole purpose of creating MM was to have a black spiderman.
Usually, after a final series of actors do screentests, a decision is made very soon after. For example, the first time around, they chose Andrew a few days after they tested him along with the other finalists. Almost every time I've heard of a final group of actors testing for a role, it's maybe at most a week before we hear who got the part. It is possible that they might still be deliberating and perhaps doing more screentests with the frontrunners, but I do think it's very possible that they have a strong idea of who they want.
Errrrrm not quite sure what you mean by this...
