Hello ,
what you are thinking about an hit system witch counts body hits and head hits like in a real Boxing fight. You can do that additional to your implemented "Health and Stamina" system.
So you can make a 3 minute round Time like in a real boxing fight an if you or the enemy is not able to get your Health down in 3 minutes then the round is over and the hitpoints decide over the winner of the round.
This feature make the game a bit less only arcadeical and brings an Tactical note into the game. So if i cant land enougth hits to bring the Healthbar down so it is also possible to land many hits to get the most round points and win the round over the time an hitpoints.
In real boxing there are more ways to win the the fight not only an K.O.
It`s just an idea that i want to tell you.
I like your Content and your courage to go your way to be the best Gamedeveloper in the World..
I wish you the best .
friendly
Tino