I would rather see them remove Oathbreaker and instead introduce an "anti" Paladin class. Then change losing your "oath" so that once you lose it you become a fighter and your done. Then all you need do is not allow a Paladin to be used at ALL in the respec tree unless you are already one.
Oathbreaker is a real 5e Paladin subclass. No reason to reduce the amount of content.
