Breaking the oath is no big thing, game's wise. One or two sub-class abilities get blocked, that's all. Playing a "fallen" Paladin i.e. ignoring the Scottish dude LARPing as Goblin Slayer is not like having one arm tied behind your back.
The idea that performers and swashbuckling nobles are in some way massively distinct had me up in stiches. Both are extrovertic attention hogs, so what's the difference?