Yeah nearly all the gr3 cars are understeer bags of dullness now. 911 way worse. The Z4 was good but got nerfed and turned into a wallowing barge on-throttle. Looks like I wasted my time doing a livery for that. But the WRX is not bad and my go to car atm. The 650S handles really really nice now, pity it's so slow on the straights.
Dunno why they can't go for a bit more realism. The 650s, R8 and SLS are generally the best cars in various real gt3 series. The Japanese stuff is pretty crap (deal with it devs).