Never had a tire cupping issue thank god. For bettor or worse my suspension is all original (shocks, struts, springs, and bushings) and it doesn't seem to affect anything.

I don't believe that some vehicles simply wear unevenly, unless they were sold new that way something must have happened between then and now to cause it.

Your geometry must be off, did it wear unevenly before the lift? My parents had K02 on a Wrangler and despite not rotating the tires once in 40k miles the tires wore relatively evenly (they wore at different rates as you would expect, but a normal wear pattern).

If you cant find the culprit run some road tires on a different set of rims when you aren't going off road and swap your expensive rims/tires when you go wheeling. K03 are $$$.