When you overheat you have to wait your overheat time to start overheating again
for the full time.

I notice myself holding the F key forever sometimes in the heat of battle.

So suggestion:

Once over heat is over kill the F key so even though its being depressed it doesnt
register in game.

Other suggestion:

Include a light or fill bar (4 colors red, oragne, yellow, green) saying that your
overheat is back at full potential.

No colors - empty
Red - 25% of overheat is back - you'll overheat 25% of your overheat time
Orange - 50% of overheat is back - you'll overheat 50% of your overheat time
Yellow - 75% of overheat is back - you'll overheat 75% of your overheat time
Green - 100% of overheat is back - you'll overheat 100% of your overheat time

EDIT**



Edit****

Or even just a green light similar to that of landing forces just showing that your
overheat is back at 100%.