My wish is to have the auto heading feedback control loop better dampened so that the heading of ships (and to a lessor extent) vehicles don't oscillate back and forth after a turn. I can't for the life of me figure out a physics reason why ships, or vehicles, would do that in real life.
[Everybody recognizes that ships in AH do this back and forth oscillation after a heading change as they complain about it while trying to aim the guns, but if you pay attention you can see the vehicles do that to a lessor extent as well. If you turn right and then stop commanding a turn the vehicle will slew back to the left, then a bit to the right, before taking a new heading that is left of your original desire.]