It's too many buttons, because of that I tend to forget its existence. I unbound the spacebar thing, but sometimes when I want to use the 3rd or 4th) pilot tool I still press "E".
I tend to use it to get an acceleration boost in any direction, making it more of an extra emergency tool for me. Also to make up for the lack of phoenix claw on the Mobula, so it decreases the disadvantages it has.
It somewhat negates the reason to have buff, but then again, everybody has stamina so you might still need buff to get that manouverbilty advantage or to even it out again.
Pilot stamina increases the skill gap between the ships that are good at this game and the ships that are less good at this game.
If pilot stamina will be changed, it should be more than an alternate pilot tool and do something that the pilot actually could need. People said something about going 3rd person or activating some Sonar ability to find ships, like the old drums.
Fun fact, engineer and gunner can both recharge their Stamina, by rebuilding (engineer) or destroying (gunner) a component, while the pilot can only recharge when his ship gets a kill, which also recharges the other classes stamina, making the pilot's stamina more valuable.