It literally takes about 20 hours to master
Not gonna lie, 20 hours is being hella generous. I only spent 3 or so hours in the game and the only thing that I felt was holding me back was my access to good gear and higher levels. Was already getting a highly positive KDR with my peasant rags and dull blades, didn't really think the controls took all that much adjusting to, and once you were used to the controls the gameplay was so shallow you could "master" it in just a couple hours. If there was one aspect that I didn't get a chance to fully grasp (at a competitive level) it was the stance lock toggle, but it was only ever optional and I still used it effectively enough to turn with a held swing, I just didn't take it so far as to reliably apply it to feints/spins or w.e. I guess I should also note that I stopped playing before the jump-swing meta evolved since that stuff wasn't added until after. Not sure if that made the game easier or harder to master, but it looked pretty dumb regardless.
HAMMERLAW?
A shame you never backed that thread up on these forums. That was the only reason I checked in on those forums once a week or so until you stopped posting updates.
Let's just take a moment to remember the aspect of OKAM that was truly superior... the ability to embed quotes on the forum as above without manual giggery-pokery
It was a useful feature for sure, but in order to avoid endlessly long quote chains you'd still have to manually go and remove some of the text yourself. Ideally there'd be a checkbox that you select to include the full quote chain or not when you quote a post.