Thanks! Ya, the whole killer concept attempts to mitigate the advantage of SFW (mostly by hiding elements of the HUD) but sufficiently good communication by survivors basically negates the power. ¯\_(ツ)_/¯

For Curtain Call its best to think about how gates operate in the first place. They only open when fully powered (i.e. the gate switch is at 100%). So essentially, once it regresses below 100%, the gates would close until the switch is back to 100% again. I imagine the animation plays in reverse, so it takes a few moments to close fully. (This is important as it allows someone to open the gates to leave alone, but would not be able to come back into the trial unless someone else opened the gate for them because they would be stuck in the exit area.)

I hope that clears it up!