So, now that they clarified that Kensai weapons ARE monk weapons, what shenanigans can we pull off with this subclass?
I am still dubious about it being worth it, except at early levels.
As early as level 5 you'll be able to do one or two great sword attacks and one or two unarmed (pretty strong) OR two great sword and pummel for extra 1d4 damage. This is so subpar in comparison I am not sure why it's there.
Pummel could be useful if your kensai weapon is a bow, in which case, when you fight at range, you will not always be able to punch things nearby. If you're spreading the damage to multiple foes it might even be more damage than hex, since it applies twice.
One with the blade's accuracy boost costs you your bonus action and therefore seems to be mathematically less valuable than one or two extra attacks. It benefits you only if you're using great weapon fighter or sharpshooter on a high AC monster.
Eventually martial art base damage overtakes most weapons' base die, rendering the advantage of kensai weapons nill. At high level feats are the only things that add any value to using weapons instead of unarmed attacks. I suppose you still get the AC bonus, but stil...
Could a polearm master build bring something to the table?