Got it for xmas. Personally, I'm really enjoying it. Admittedly I have only played the GT class so far but one thing I would like to see is the option to turn off the Rolling Start. It's fine for stock car races but not for GT races IMO.
The tyre degradation that was in Grid Autosport was good and I liked that, haven't come across it thus far in 2019 Grid as well as fixing damage after/before races. I mean, don't go the whole hog as in DR2 where the damage completely ruins you between rallies, but a halfway house.
People clearly have high expectations, and maybe they should; Forza Motorsport is decent, but it misses out on some things like qualifying and damage repair but throws in gimmicks such as "mods" that do little to add to the experience.
Either way, I'm enjoying it and I'm hopeful that some of the features missing will be added at a later date.