Yeah I’d look at spring rates etc and maybe play around with more rear tire pressure and stiffness in rear. My buddy has been autocrossing rwd cars for years and is a great driver. He switched to a fist few years ago and just at the end of last season he said he finally figured out how to get car to rotate the way wanted it to. I have been mostly been autocrossing fwd cars and never could understand what he couldn’t get lol. With my car on stock suspension I can take on ramps winding out 2nd and at anytime I can get off gas then the rear will drift out even on tires like re71r’s etc. get back in gas and rear goes back straight. Maybe need more off throttle technique to get it to rotate on demand.
Maybe I'm too smooth?? lolz.