I decided to do a clueless walk-through of the Fighter.
Fighters aren't my thing but it's a straightforward starting point.
I say Strength and key on damage (ho hum).
I start reading.
I don't see total damage climbing much past 25hp per round (right away).
Lots of small status effects. Lots of defenses boosting.
Anybody who's played a 1e UA Fighter through 5e Fighter
will probably see a Fighter and think : Fighter.
Revealng Stab [Two-Actions] Feat 6 ... caught my eye.
Easy rider on an attack, ~"Mass See Invisibility" and even Action Denial.
I like it.