Mouseferatu
Hero
I would simply make the following changes:
Divine Defense: When wearing no armor and not using a shield, you add your Charisma modifier to your AC. This replaces the paladin's medium/heavy armor and shield proficiencies.
Dexterous Combatant: At second level, choose two versatile weapons, or one versatile and one two-handed weapon, that are not finesse weapons. You gain the ability to fight with these based on your Dex rather than Str, as though they were finesse weapons. This replaces the paladin's fighting style.
(Note that it says use use them as if they were finesse weapons, but not that they count as finesse weapons. This avoids multi-class abuse such as taking levels in rogue to sneak attack with a greatsword.)
Note that if you take advantage of these options, you must choose the Oath of Vengeance upon reaching 3rd level.
(All of the above off the top of my head, and not yet examined for hidden exploits or repercussions.)
Divine Defense: When wearing no armor and not using a shield, you add your Charisma modifier to your AC. This replaces the paladin's medium/heavy armor and shield proficiencies.
Dexterous Combatant: At second level, choose two versatile weapons, or one versatile and one two-handed weapon, that are not finesse weapons. You gain the ability to fight with these based on your Dex rather than Str, as though they were finesse weapons. This replaces the paladin's fighting style.
(Note that it says use use them as if they were finesse weapons, but not that they count as finesse weapons. This avoids multi-class abuse such as taking levels in rogue to sneak attack with a greatsword.)
Note that if you take advantage of these options, you must choose the Oath of Vengeance upon reaching 3rd level.
(All of the above off the top of my head, and not yet examined for hidden exploits or repercussions.)