Maybe this is thinking ahead to 4.0. I don't necessarily advocate ability bloat but I would like 2-3 more abilities per class (5 might be too much per expansion now).

But with current issues paladin is facing, what if the solution is making them more defensive/supportive, than increasing their DPS?

How would the community feel if paladin had a GCD ability that didn't interrupt combos and decreased damage taken by 10% for 10 seconds? As well as having a GCD ability that DOES interrupt combos and decreases damage taken by 20% for 6 seconds? These abilities stack with shield oath and with each other, as well as rampart/sentinel.

This basically allows paladin to turtle up before tank busters. Applications include stoneskinning themselves during a jump, then using these abilities as they run to the boss and taking little damage for a while before using cooldowns.

The best part is that this means active mitigation is more of a thing (inner beast and dark arts being pretty cool, it's sad paladin doesn't have active mitigation).