Thanks for sharing.
The gladiator looks fun. It's an entire subclass dedicated to giving flavour and substance to your attack action. The 18th level feature is cool as heck, too, although maybe not particularly strong (by the time you manage to activate it and apply it on an enemy, it's already on death's door).
I can't help but notice that half the martial kit these days is "apply different/additional mastery properties to your attacks" and wonder, why didn't they just made the mastery feature more customizable from the start?