Yes, they can add new rims for standards (after they added more A-spec events and improved this ****ing UCD). My first car in this game was a old civic... It had butt ugly rims, eventhough it has millions of aftermark parts in RL and got a huge fanbase.
But I hope PD does never overdo it with custimisation. I already hate it to race against people with neon green + carbon hood 599 or gold chrome 8C competitzione + black rims.
Damn, this is a racing game. I want to race cars like the M3 GTR Race Car or Abt Audi TT. Real race cars. No "tuned" supra etc. As long as we have no option to make race cars out of every car (What I mean is, no matter what you do, a race car will always beat a road car with same hp/weight settings in GT5, eventhough you max tuned the road car), road cars should be road cars and not cars with gulf liverys but zero performance.