I think from a flavor perspective, the Monk has a lot of good fluff! The moves all sound really cool and the Opening-Flow-Finisher system is an unique system that makes you really think about what moves you’re gonna use next each round.
The downside is that I think it also limits you a lot as well. Being locked into effectively a third of your move pool on any given turn feels stifling, and there were a lot of moments where I really could have used the effect of a move that I wouldn’t be allowed to attempt until 2 turns later. In my experience, any time a tabletop RPG tells you “You get to do this 2 turns from now!” it might as well say “This will work like maybe once or twice in the whole campaign.” It’s just too unpredictable for that stuff to work out consistently.
Those are just my thoughts, however. It’s totally possible your monk will have a different experience and I’d love to hear what they have to think as well!