You know, since valve technically added an overheat mechanic, sorta, they should removed the one second penalty and instead make every minigun have it's own little overheat system.
minigun: during the first three seconds of firing, knockback increases up to 30%
natascha: over 3 seconds, the amount of slowdown applied is increased (note decay will still affect it)
brassbeast: accuracy increases to the short stop's over 3 sec.
tomislav: bullets become quieter and movement speed increases to the demoman's.
huo long heater: the ring of fire becomes more intense, pulsing faster and farther.
also does anyone want to trade stranges for the skullcracker taunt.