I'm also glad she acknowledged that this shouldn't have been going on so long, but I think it was talked about on here that in gem time, it's as if Rose just died recently.
I was thinking about all Rose would've had to do to have Steven being a half-human. Shape-shifting all the necessary organics, down to a cellular level, out of whatever hard light the gems' bodies form from, and then that combining on a permanent basis to form Steven's DNA, his chromosomes, and her having to stay shapeshifted like that for the months it took Steven to form (or hell, considering how his body functions, it could've been longer than usual) ... thinking about the details of all that really drives home Garnet's comment in season 1 that there's never been anything like Steven before.