Hello, Pexe here 😁
Thank you for the question!
The idea is to add the possibility of a miss on a d6:
6 = miss
5~4 = success
1~3 = partial success
If you are not agile, the opponent will always have at least a partial success, being agile makes them able to miss!
And if they want to push themselves, it will always sum 1, so the miss chance is increased in each subsequent push.
But like you said it doesn't affect their chance of a full success, it's still 2-6.
We definitely can make some adjustments to the balance of the game in the future, please let us know your thoughts!