One of my players wished to "trip" an opponent with his quarterstaff attack, so at the time I allowed to play out as a "shove" but using dexterity instead of strength, as that was how he was attacking due to martial arts. Upon later examination of the RAW it seems this isn't specified anywhere.
I am planning to house rule that with Martial Arts a monk may choose to substitute acrobatics for athletics when making a "shove". I'm curious what others think about this. Does it imbalance things or does it seem like a sensible house rule.
The one possible conflict I've considered is the Open Hand Technique, but that is still far more powerful as it requires no contest on the part of the monk and allows the monk to force a saving through of her choice on the opponent. So it feels quite different to me.