Please, add a "momentum" variable, set in seconds, for each direction (leaning included), a vehicle can move. This will be the minimum time allowed to switch movement or stance, or a gearbox reaction time.
Mainly aimed to bring more realism with handling of tanks as a driver, it will have a beneficial impact on every vehicles (player included) in the game.
Also really true about engine throttling, IRL - for planes at least -, the control and true power are not synced.