Hot take, but I'd make it a tank role skill for all tanks to utilize. It would free up PLD with an open spot, give all the other tanks some good utility and the shenanigans you can pull with it is potentially endless, ex. both tanks cover the healers for mechanics, OT covers MT to take a slashing debuff, etc.

Even hotter take; they should also remove rampart. With the introduction of short cds like BW, shelltron, TBN, etc, acting as a shorter but powerful version of rampart (20% mitigation) it seems redundant to still have it in-game. The only reason I can see to keep rampart is for low lvling dungeons but honestly if the healer just spammed heals on the tank they can pull quite a bit w/o needing to use cds. In most cases lvling roulette that already happens, in addition to the tank not putting up stance.