I like how paladin plays. I don't think it needs a complete overhaul, it just has some issues that need to be addressed.

1. Allow Skill Speed and Spell Speed to affect paladin's physical and magic abilities (or combine both stats, but that might be more of an expansion change).
2. Allow blocks to affect DoTs and work while stunned if Sheltron was used.
3. Adjust the length of the rotation. Right now you either get enough Skill Speed so you can drop an Atonement every minute, or you completely ignore it and drop two Goring Blade combos every three minutes. Giving Resquiscat a sixth charge would help with the no Skill Speed build, but having any Skill Speed would still have its issues.
4. Give paladins another defensive ability. I want to avoid button bloat, however, as paladins are already pretty button heavy. The Clemency example below could work.
5. Remove the heal requirement from Divine Veil.
6. Add a new job gauge that keeps track of Requiscat charges. This just a cosmetic change, it wouldn't affect anything but would make it easier to see how many charges you got left since you won't have to look for a tiny buff icon.

I would also prefer if they don't touch Clemency. It's one of the abilities that has draws me to Paladin as I love having an on demand heal that can be used on others. I've saved quite a number of encounters with it after the healers and ressers all died. If they added a trait that gave paladins a free OCD Clemency every minute, that would be fine, but I still want the skill available when that trait is on cooldown.

Random example: Expiacion grants a stack of Clarity. At 2 stacks Clemency has no cast time, costs no MP, and is off the global cooldown. Max 2 stacks.