Criteria? It does sound lighter and I suppose expected in any kind of committed relationship.
My main gripe is when a rule/criteria seems have to faded with time only to come back and cause more imposition. Sort of like a dog who thought he was set loose and sets off running, then bamn!...the leash chokes the crap out of him. Eh, just have to deal with them at a reasonable and comfortable pace for all, huh?