That's affirm. The stiffer springs will have the most jarring effect in the rear due to the live axle. No way around that. And your 35 series on 20's aren't helping the matter. Just avoid the potholes and enjoy your 1000% better handling car.

I used to run my H&R Race front springs with the steeda competition rears because the HR rears would beat the living crap out of me. I'd prefer a nice soft rear spring with very stiff front for greatly increased steering response but that's far from ideal. They match spring rates for a reason I guess...