Paladin, 6.3 reworks, what do you want to see?

[Zairava]

#1. Intervention merged into Holy Shelltron. One less button to press, works the same as Heart of Corundrum on Gunbreaker (Cast on self or ally).

#2. AoE Atonement from AOE combo, something to press outside of Total Eclipse/Prominence spam during melee rotation in AOE.

#3. Passage of Arms as an Activated spell, not channeled.

#4. Holy Spirit and Holy Circle merged into one. 300Pot for first target, 130pot for everything else.

Mostly just removing button bloat by merging skills that should be a single skill, and cleaning up the clunkyness of PLD.

Not Warrior 3.0, that's how low my bar is.

Now on what I would like personally (some of this is likely to happen too, in some form or another:

1)Shield bash removed, it's rarely, if ever, used. With low blow being a role action aside if you really need that stun, which on it's own costs a GCD, pretty much nullifies any point of putting it on your bar.
2)Fight or Flight replaced with Requiescat upon using Fight or Flight, like how Summon Phoenix replaces Summon Bahamut.
3)I personally don't like how atonement currently feels in the core rotation, even in Shadowbringers. I'm not sure what I would do with the ability, but I'd like it modified in some fashion that isn't just use it 3 times in a row (and no, I wouldn't want atonement to be a gauge spender, either.) I honestly wouldn't complain if it just got turned into an upgrade for riot blade
4)merge cover with intervention. I don't see this one happening as, frankly, it would be overpowered as hell, and would leave only one gauge spender in the form of holy sheltron. It's far more likely they would merge intervention with sheltron as you listed. Which in that case, I would like cover to return to it's Stormblood counterpart then be put on the oath gauge on the same 2m cooldown
5)While I like the interactivity of divine veil, in the current form of combat in this game it would be better if it just shielded the party on use
6)It would be pretty cool if the added a 10-20% boost to to the mitigation of blocked attacks during Sentinel to differentiate it from the other 3m tank cooldowns.
I can't really think of much else on the top of my head

[Jeeqbit]

1)Shield bash removed, it's rarely, if ever, used. With low blow being a role action aside if you really need that stun, which on it's own costs a GCD, pretty much nullifies any point of putting it on your bar.

I think Shield Bash could become an ability with a 2.5 recast. Low Blow doesn't fit the identity of PLD, so it could just be a trait that replaces Low Blow with Shield Bash.

2)Fight or Flight replaced with Requiescat upon using Fight or Flight, like how Summon Phoenix replaces Summon Bahamut.

That would make sense if the rotation under each was the same like on a Summoner, but it's not.

3)I personally don't like how atonement currently feels in the core rotation, even in Shadowbringers.

I like it. We used to just do the Royal Authority combo twice. Spamming Atonement 3 times was a welcome variety from all the Royal Authorities and the animation feels good. There is room for it to be upgraded in an expansion, because we could eventually do Atonement x2 and then a finisher similar to how we started doing Confiteor instead of the last Holy Spirit.

5)While I like the interactivity of divine veil, in the current form of combat in this game it would be better if it just shielded the party on use

This was needed a lot in previous expansions, but at least at level 90, you can just align it with the Requiescat phase. There is argument that lower levels still rely on the healer to use a GCD which they usually won't.