I’d be ok with it.
Lack of utility is the key issue (especially from the tank PoV). Prot brings very little utility wise compared to VDH and PPal. So, unless, they bring extra survivability (maybe a bit) or extra damage (no), there is zero reason to ever bring a prot war compared to higher utility tanks.
Edit: after playing prot pally and vdh a bit this season, I never realized how useful it is to have a 30 yard silence on a short CD or an aoe ground silence / chains to gather mobs.