Well i dont know if this would work in GoI:O. All other helm tools simulate an action that could be taken in reality; such as modifying the fuel or gas mix to increase output of engines and balloons respectively. (with the exception of phoenix claw its a bit silly but an increase in turning output was needed so.....phoenix claw...yeah
, though an argument could be made it is influencing the pilot directly, with a boost of confidence or whatever, and as such the way he or she is turning, red lining the turning engines and thus causing damage to them).
What would be the reason your hull in taking less damage? Like what physical act would this be simulating. if it is extra armor soaking up the damage why doesn't it behave like other armor in the game. So maybe its special armor, like extra heavy, so that is why engines are damaged, because you gotta red-line them to move, but why would they not take damage all the time because you still gotta lug this armor around with you the whole time even if its not deployed. Furthermore, why would the guns take damage? and why would the balloon not be taking damage?
More straight to the point, how is it helpful for anything beyond delaying an inevitable death, If all your stuff is damaged you cant contribute to removing the damage source. yes, it may buy enough time for your teammate to come in, but as you have disabled yourself the enemy has no reason to keep damage on you so they can team up on your ally and deal with them untill they die or disable themselves with repair mode. then they either kill your ally or team up on you when you have un-disabled yourself, not having to worry about your ally as they are dead or self-disabled. rinse and repeat until the enemy wins.