I can understand creating new boundaries as the objectives move forward in Push. Though, ultimately there should be a timer. There have been numerous times I have been caught in the area and needed to fire my weapon, even leaving the zone; which is what happens nearly every time. I know your intention was to keep people from being unsportsmanlike and spawn camp. However, in reality this should be addressed like most every other game does; give a player a timer or at the very least allow people to fire their weapon when needed up until their very last breath.
I still absolutely love y'all's game. Cheers