Gradual Breach Depressurization
Currently, when airtight room is breached (or door is opened to unpressurized area), the air pressure drops from "full" to "none" in instant (next tick).
The room should lose the air gradually over time.
How fast should depend on the size of the breach relative to air volume.
Reason: automatic systems (scripts) could seal compartments (close doors) to stop air loss and/or air vents could recover some of the oxygen for further use.
Maybe even add 2 more "action buttons" to Air Vent:
1) triggered when Air Vent detects that area loses airtightness
2) triggered when Air Vent detect that area gains airtightness
Thus damage control could be performed without PB scripts.