The Oathbreaker just screams 'inappropriate ' for someone to seek absolution from for the type of Paladin we have playable right now. The fellow straight up offers to convert you into an Oathbreaker...this guy is going to cast atonement and intercede on our behalf for us to get back in the good graces of our deity? It seems absurd that the same individual who offers to lead us further from the 'light' can just smooth things over with every god our paladin might be a follower of-ridiculous.
It also reduces the process of falling and redeeming a paladin to a purely transactional one-honestly If all you need to do is pay a fee and you are off scott-free then it robs the all the gravity of the situation. A paladin falling is suddenly just a momentary monetary inconvenience from smoothing over murder w/e.
Redeeming ourselves should be something that actually requires effort and sacrifice on our part beyond the equivalent of paying a parking ticket. A quest to prove ourselves, etc. And it shouldn't be available right at the start of the game before we even reach the druid grove. And it shouldn't be given by the same npc who makes you an oathbreaker! The whole atonement/oathbreaker thing is just so ridiculously instant gratification it's ridiculous.
And now we have *another* conspicuous high-level undead hanging around our camp serving particularly transparent gameplay conveniences.