i'd definitely like to see things like accuracy increases or decreases depending on your actions,
would prefer if it was just swaying the crosshair instead of making an arbitrary cone of fire, since skill and experience can compensate for that over time,
Something to note though, to have fluxuating accuracy based on movement not be an enormous pain in the ass, you'd need 2 things.
A. shitloads of very flat terrain. You play enough FPS games and you take for granted how stable your character is since they almost never have their aim affected by changes in elevation. When you are in a vehicle however, every bump in the road causes your view to shift. Especially true in the crysis engine.
B. A movement system not based on boat throttle. In retrospect, i think the boat throttle movement method in MW games really shot us in the foot. It made for gameplay that tended to require a lot of space since it was usually not well suited to the constant input changes that you'd need to actually handle lots of stop n go action. the boat throttle method has so much delay in accelerations and course changes that the entire point of having mechs i.e. maneuverability, becomes moot. While suited for long open expanses, its not a good method for close up fights or quasi tactical movement that doesn't invovle cruising out in the open at full speed.
As simplified as it was, bf2142 had the right idea, sort of. When you walked, your stride would cause your aim to pendulum in a repeated manner, and holding the go faster button makes it more pronounced. Its a shame none of the weapons on the mechs themselves were worth a damn. Missles were worthless past 100yards due to spiraling all over and the autocannons only killed infantry, cars, and unlucky aircraft. Couldn't even scratch apcs, tanks, or other mechs.