It's exactly the same as a weapon mastery.
Unarmed strike got Flex.
Ah yes. The most boring and arguably weakest of all of the "masteries" that nearly every person discussing Weapon masteries has claimed is by far the worst of them since the system was publically announced. Such a great alternative. ...sarcasm aside, you seem or have misunderstood or failed to read the rest of my words on this point: the monk's unarmed damage should have been buffed to what they did in the playtest
from the start. Having Monks start with a d6 and go up to a d12 for unarmed attacks isn't giving them something new, it's
fixing a problem. Monks do not keep up with other martials, especially at higher levels. Now if you bump up the dice one more
additional time? Then we might be able to conclude that they were "given" a mastery, but even then I'd be argue that I'd rather have the ability to
choose which mastery to apply to my unarmed. I'd gladly take Topple, push, vex, slow, or literally
any other mastery option over flex. Heck Flex needs to be redesigned for a number of reasons, but that is a whole other conversation.
I disagree with the idea that Unarmed Strikes need a Weapon Mastery. I think what Unarmed Strikes do need is to be able to pull off the push, trip, etc. tactical moves that a lot of other classes are getting, but based on Wis or Dex instead of Str. So not a tacked on weapon mastery, but a distinct class feature. Definitely feels more "martial artsy" that way.
Then add in a way to spend di points to possibly enhance these maneuvers, either as a core ability, or for the subclasses.
Finally, have the unarmed attack die size apply to monk weapons, so it's a meaningful choice to use either your fists with the options mentioned above, or a weapon and take advantage of its particular weapon mastery feature.
Precisely.
I don't disagree, but the Push and Topple masteries seem to scream martial arts to me.
Precisely.
The monk as written here just screams "hey martials, look at all these new cool toys you get! Same with you paladin, ranger, and even
War cleric. No, not you monk. You don't get them, not at least if you want to use your core features. Use weapons instead. What? What do you
mean you're the only martial without martial weapon proficiency? A d10 hit die? Why are you so
greedy? Ya might as well be asking for the moon!"
Also, for those people looking at using short swords with their monk, check again under the monk weapon proficiencies and weapons chart. It may or may not be a typo but monks have lost proficiency with short swords.