Augmenting the Cover effect sounds great to me, especially cause I'm probably the only PLD in the history of FFXI who has it fully merited \o/
That aside, raising enmity cap for PLD may not be the smartest idea, since once they're over cap, they would stay there and it would make it impossible for other jobs to take hate, unless the PLD takes massive damage. Sure, that would solidify a PLDs role as a tank, but maybe make it a bit overpowered. I guess it depends on how much they increase the cap, if they do. Just a bit too much, and it would be overpowered, not enough and constant hitters, like MNK or dual wielders, would get hate back all the time, making the mob spin like a dreidel.