Option A....ok with that.
Option B...safest bet allround given the factors that need to be balanced.
Option C....interesting concept, may split the game in two...
Option D....not an option. If something is broke...you fix it...simple as.
Status quo only benefits level 20s and pay-to-winners and handicaps low to mid range league managers.
Jack...your initial instinct was good...the current 'half finished job' isn't really an option it doesn't address the xp issue for those who don't want to, or can't compete in QRs and doesn't address the parts/engine issue for those who do. Worst of both worlds.
If you are going to run a second vote then you need...for balance to add option C
Option C. Drop Quick races entirely.
Maybe a different more arcadey game can be launched out of the concept if that happens.