i agree with what was said above about the Paladin Oathbreaker not being able to just buy their way back in. Redemption shouldn't be a matter of coin, it should at the very least require effort and dedication on the part of the paladin to prove themselves worthy of redemption, i.e. a quest chain or some such.
To date, the paladin is by far my favorite class in any game, but here, it feels... hollow. Aside from spells and dialogue choices, there is nothing that makes the paladin "special". No communing with a chosen deity to reaffirm their faith and connection to the source of their power.
I know it's the same for the other classes (no meditation for the monk, etc.), but i feel it more keenly with the paladin. /shrug