I'm surprised there isn't a thread on this yet given it's out in a a little over a month.
There's some pretty good reviews coming out in the early previews highlighting the world variance and it feels more alive than previous titles. Slightly improved physics and tweaks to game modes with the inclusion of time trial that you can do on circuits that are accessible in free roam.
I played FH4 a lot but didn't get on well with FH5 so much - playing it for a week or 2 when it was on game pass. I've decided to buy this one though so hopefully it's good 😄