I recently returned to wow and 99 twinking and can safely say, that retribution paladins are really good.
In last 50+ BGs I played, there wasn’t single one where I wasn’t top dmg, KBs, etc... Nearly every BG I have 2-3 times the dmg of the second person.
2/3 v 1 also isn’t a problem most of the time, with the people who play in the bracket.