I love Frozen. But I agree it was not the first Disney movie to do all these things. But I do feel like it was the first Disney movie to address all of these things together. It made a point to go against the usual formula of a Disney princess movies and that's what I like so much about it.
"Disney Princess Impressions. This may have been extra funny because I watched it at 1 in the morning. But it was also really impressive. Her Belle impression was scary accurate." didn't actually watch yet but i will