Yes. Vendors sell the required gear all the way up to 68. It's the height of insanity to allow someone using level 60 gear into Castrum Abania where they get blasted to smithereens and don't know why. A restriction is going to at least force them to recognize what the issue is.

They don't need to be strict requirements, but I had someone tanking Sohm Al yesterday wearing broken white level 30 boots. There's no reason that has to be a thing.