Yeah, totally glossed over the bit where you were focusing on Shove being a bonus action and causing some wacky balance. Thought it was moreso the fact that it’s even a mechanic in the first place.
I mean, while it was hilarious I could shove all three bosses in the Goblin Camp into chasms before they aggro’d me, it is broken in that A) you can shove non-hostile NPCs indefinitely with no repercussions, and B) you can do a full attack and always Shove in a single turn, which has huge benefits for characters with high STR.