I reaallly like this suggestion. If the rounds weren't so long, this would be feasible and awesome. Unless it's complete domination, round edge towards the full time allotted, so "saving" would also become more difficult.
In office server i never really thought this as a problem, as cucu said we just play casually after the switch. but in dust though, you cant really manage this , so maybe implementing this(2 pistol rounds) on the de_dust 2 24/7 servers would be a good idea.