Destiny orients towards FPS, not racing. If they progressed on SRL, people would start moaning about stupid and complicated ideas featuring a competitor tournament side of SRL. If you want to race, go into Forza. To be honest, Bungie's strong point doesn't focus on racing. Let's get PvP and weapon rebalancing right first, and possibly updating Raids and PoE. Then we can get into the more advanced ideas. :D