Black Panther has a different editorial, who i believe, just by reading the stories they put out, are much more progressive in that sense than the yahoos at Spider-Man and their outdated ideals. Shame because Spider-Man has been at points in time a real pre-cursor to a lot of progressive storytelling like killing main leads and drug abuse.
I'm not saying they shouldn't turn Tiana, quite the opposite, i think her character seems better served being a villain, what i mean is i don't think Spider-man editorial has it in them to do it because of backwards thinking on what true positive representation really is.