Suggested

Change hight and wings in race

Maybe this has been suggested before but I think it could be nice to be able to change the hight and wing within the race and not only in the setup. 
Maybe not that much as you can do in setup but it could be interesting with dry/ wet race. Some would find the perfect combo when the weather changed but other could struggle more and the race could be a different race. 

Maybe remove the opportunity for buying perfect setup aswell

I love this idea and i agree 100%. Irl they are able to change the front wing set up during a pit stop so i think being able to modify at least wing levels by a ±5 or ±10 (categories also need to be taken into account) would be great. It'd help you in case of mid-race rain or if you were too late to do a set up, so you can sort of "limit the damage".

Irl they are also able to change the front wing so getting a "buff" in case you have a car that's not at 100% might also be nice. Ofc this will cost you some time in the pit stop, and im talking about parts only and not the engine

I don’t hate the idea that’s for sure, I think it’d be great, add perhaps 4 seconds to your pit stop, but could potentially make that back, or not, which adds some strategy.