Wheelbase is part of the equation but with proper tuning it could be better. It isn't old Jeep CJ5 bad, but for a more upscale it could be better. It clearly is still there in G2 R1S's. Some people may be less sensitive to it, and others may just be on roads that aren't as likely to induce it or maybe drive more sedately or any variation thereof.
You have a shorter wheelbase than the R1T, and still the same height. At least they got it as long as they could with minimal overhang front and rear. Maintaining a long wheelbase relative to overall length is very important for driving dynamics.
I don't think they'll ever get the R1S as good as the R1T with respect to ride comfort and less porpoising. The taller ride modes don't help.
