Tire change in game. Paint and design in game

I should be able to change tire type ; eg stock/street/race/drag in game, without having to leave back to the pre race menu.

I should be able to paint or apply a downloaded design in game menu without having to leave online game. Example, meetups.

If I’m tuning/designing new cars I can buy and mod but not paint. I can test but not switch tires unless it race tire and only between h/m/s/w
Which is great. But why not allow all tire types in game?

And where’s the dyno charts?!