You obviously chose the wrong wheel design...did you do a trial fit, or did you choose, "Thats looks cool"....seems to me if you had performed a trial fit you would have noted what offest was required. There also the issue of backspace which you never noted as well.
Ranchos H3 system is a very well designed, quality suspension system.
What you describe as far as ill handling can easily be attributed to tire tread design, improper inflation, poor alignment.....on and on....
Having had multiple Rancho systems over the years, I have yet to see a poor design from them, including the H3.
The H3 suspension is not a rocket science setup....
Also the comment on brakes.....anytime you add rotational mass at the axle brake performance degrades.....
While the RC setup looks pretty nice, the Rancho won't void the drivetrain warranty like the RC probably will.
You guys need to recognize the difference between these two mfg's..
Rancho bar none produces some of the finest off-road suspension systems manufactured...H3 included.
There is a reason the RC isn't being mass produced an that is to address bump steer issues...I am sure thay will reach a compromise on the design.