Yo,

There's a variety of pugilist features that do not dynamically function properly with the character sheet or are poorly written.

1. Muscle Mass (lvl 3 squared circle subclass feature)
   • "Choose the Acrobatics or Athletics skill. If you lack proficiency with the chosen skill, you gain proficiency in it, and if you already have proficiency in it, you gain Expertise in it."
   • This feature doesn't have a choice to make in it and does not grant you proficiency or expertise on the character sheet.  It effectively does nothing if you're not manually remembering it and the choice you made.
2. Groundwork (lvl 3 squared circle subclass feature)
   • Compression Lock. When you start your turn with one or more creatures Grappled, you can deal Bludgeoning damage to each creature you have Grappled (no action required). The damage equals one roll of your Fisticuffs die plus your Strength modifier. 
     • This feature has tick box indicating it has a limited number of uses when it does not.
   • Stop and Drop. When you hit a creature with an Unarmed Strike and don’t use a mastery property as part of the attack, you can use both the Grapple and Shove option.
     • The point of the feature is to allow you to use the grapple and shove options together instead of damage. (Link to confirmation from sterling Vermin)
     • the mastery text is pointless because unarmed strikes don't have weapon mastery but without it it makes it seem like you can get all 3 features from an unarmed strike which is also wrong.
3.  Down but not out (lvl 7 feature)
   • When you use your Bloodied But Unbowed while you are Bloodied, you can add a bonus to the damage of your Unarmed Strikes and attacks with Pugilist weapons for the next minute. This bonus equals your Constitution modifier plus the number of levels of Exhaustion you have. Once you use this feature, you can’t use it again until you finish a Long Rest.
   • This feature doesn't have a way to activate on the character sheet.  Damage bonus is not reflected.  There's a way to turn on the rage bonus. 
     • Unnecessary but It might be nice to add the hp threshold for bloodied dynamically into the feature for people unfamiliar with the term.

I just bought this and haven't had time to really get into it.

1. Muscle Mass:  Easy enough workaround, just use the manage skills button, but should be fixable for the devs.

2.  Is that referring to the number of Moxie points perhaps?

3.  They may get to implementing this, Rage and I believe Bladesinging can be activated.

The damage die replacer part of the core rules doesn't work for anything other than unarmed strikes either

Fisticuffs Die is not applying properly to Pugilist weapons.