Price wont change, I highly doubt it will go lower.
As for the looks, I can see it changing.
I dont mind the controller (well , except for the White one).
The console for sure is ugly as hell, I wish there was a black colored version, I prefer my hardware to be black....well except for the Series S - which actually looks nice lol
I think the price will go lower, but to original 500$. The PS5 got increase to 550 or 600 in some regions, I guess they will go back to 500 with Slim. The Slim model always got the price cut in the past, but who knows with the current inflation level.
I might get PS5 Slim in the future, but right now the only game that makes me wanna buy one is FF16, so it depends whether it is gonna be good enough to buy a PS5 just for this single game.
As for previous PS consoles, I have PS2 Fat, but not the first iteration (SCPH-38XXX model). And PS4 Slim, one of the first it's revisions from 2017. So, going by this logic, I'll probably buy PS6 Fat next.
P.S. It's the easiest prediction one can make about Slim coming out in 2023, as it always was 3 years I think, at least for PS3 and PS4