Even schools with considerable sources of income outside of tuition - like UCLA or UIUC - don’t seem to offer a whole lot of OOS waivers and the rules appear to be fairly strict.
Honestly, is there a lot of legal room for OOS parents to sue? UMKC seem to be using a consistent approach for all professional schools in healthcare - pharmacy, dental and medicine.
Pharmacy program tuition per semester (UMKC pharmacy seems to be their highest ranked program) , dental is very similar
Instate - $5902
Heartland - $8440 ( ~1.4x)
Non-resident - $13,932 (more than 2x)
Pharmacy and dental school tuition seem to be cheaper or at par with private school options.