So they make a skill that's an invaluable cross trait for Scholars outside of PVP null and void in Frontlines, and there is no way to have one set of cross class actions defined for one vs the other. So yeah we get a new quality of life issue because updating cross class traits is a pain esp when it causes a skill cooldown. You could make it the very last of the five in the list but wouldn't be there for anything level synch'd.
Oh and I'm sure it's just an oversight but they forgot to finish what they started when it comes to 'balancing things' because the same logic that has them removing Cleric Stance from healers seems like it would apply to skills that increase DPS for tank classes since they have abilities that increase their health and provide defensive bonuses to them/party members. Funny, didn't see anything in the patch notes where Sword Oath was being removed from PVP.