Seems fair enough - the Catholic Church should give up the preferential treatment, and in return, they can be treated like every other foundation out there. No argument from me.
how would you compare the Roman Catholic clergy to other groups
No better, no worse. It's always a minority that ruins it for the majority - and the RCC isn't immune from this. There's always a conflict between traditionalists and modernisers in almost every organisation.
Having said this, I'd rate the RCC above the Polish military - at least the RCC has repeatedly in recent years held its hands up to say "sorry".