But they can currently dash + shove.
I'm not sure how high a goblin can jump but the current solution seems worst to me.
But you're right, it would not solve all one shot !
I would personnaly find shove less powerfull if I had to choose between shove or another full action (attack or anything else) but I really don't know how works the AI in video games. Probably not like my own brain.
Reworking the rules behind it is probably necessary but it would not change the game a lot in my opinion if it's not a full action. Let's say that the RNG would have to be a bit more in favour of the enemy for the action to succeed, which it is not enough in my opinion to make it a balanced action, interesting from a tactical point of view and not frustrating as it may currently be.
I think it would be less of a problem with spells like spider climb, feather fall (as a reaction), levitate and fly. Eventually.