My initial assumption on this class was that it was just going to be a strength based monk alternative, but I've never been happier to be proven wrong. The thematics live somewhere between the fighter, rogue, barbarian, and monk, in the same way that rangers feel like they take cues from fighters, rogues, and druids. I was very impressed with how it feels like both this class and a monk can coexist in the same campaign.
For the Squared Circle subclass, I was impressed that the grappler theme really felt like it had a home in this class in a way that it simple couldn't if Squared Circle were a fighter or barbarian subclass. But the Sweet Science's knockout punch mechanic both tells a compelling story, and sounds incredibly fun to use.
I would absolutely love a chance to play this class when I finally lose the role of ForeverDM.