You really don't like instant enemy respawn, do you? 
Has to be used really carefully to get away with it. If you're dealing with simpler rooms, then it's ok. For tedious and/or hard rooms, it's not that good when you have to redo those rooms over and over. Kind of punishing if the player dies and has to redo all that progress instead of at least being able to quickly get back to where you were (e.g. bubbles or leaving 1 enemy behind to prevent respawn normally). So if one pass through a hard room already rips you up, imagine having to go that room a couple more times...
QoB 1 kind of got away with the instant enemy respawn to an extent given most rooms generally weren't flooded up with enemies. I've seen other quests with 8-10 hard enemies in rooms that you have to go through at least 2-3 times, beating all the enemies to open the doors each time.
So yeah, kind of see that as a Fake Difficulty gimmick.
Edited by pixcalibur, 25 May 2016 - 11:35 AM.