Add a second or so grace period to the timer decay on defense objectives. Instead of the timer switching from green to red immediately and starting to decay, have it first switch to yellow/orange and either stay still or decay much slower, something like 25-50% of normal. Could make it a two-stage grace period if you're feeling fancy, first yellow at 0-25% speed for half a second, then orange at 50% speed for another 0.5-1 second, then the normal red at 100% decay speed (or maybe a bit faster to compensate for the slowed start).
The main benefit this has would be reducing the impact of vacating the area for a moment while a bulk/exploder swarm detonates or the driller ignites a bunch of praetorian gas. Second, and possibly for free depending on how the voiceline triggers are currently implemented, this grace period would also prevent stepping outside the zone for 0.01 seconds triggering MC to yell at you. I'd love a delay to MC screaming about staying inside the zone regardless of whether or not the stopped/slow decay grace period gets implemented.





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