Cover has almost no applications in meaningful content, and neither does spamming Clemency. At the absolute best, it lets the PLD drag themselves a tiny bit farther to see the next mechanic, but that comes at the cost of PLD having low DPS and arguably the lowest personal sustain of any tank, so it's kind of pointless - just take a WAR and let them Holmgang and Equilibrium or whatever to see the same stuff.

Clemency and Cover remain effectively useless buttons in *meaningful* content, which means they need to be reworked or removed. No one cares about performance in casual content, because as long as you have a pulse you will clear that content guaranteed.