As someone who been at revenants probably more than anyone else.
I can agree that its not that hard to survive in revenants. Spamming the entrance shouldnt be a thing(Specially not with the bugged singles+), Why not just give it a cooldown. So if you can only use it 1x every 5-10 seconds, cus you cant use the entrance while being frozen, that way someone can atleast freeze you, while not punishing those that just want to run out of cave to get help/escape to lower lvl wildy.
I wouldnt make it a one way entrance, cus on alora the mage+range is really busted. So if you cant leave cave. You legit have no fighting chance of surviving or even fighting back if you're on an ironman and dont want to risk huge amounts of gear.
And i feel like the way revenant caves are. Its nearly impossible to kill a pker inside cus of the way single+ is here. (Can legit freeze step under and logout) I dont think the cave jumping should bring an extra mean of survival for pkers.