Any action that require mouse input while left click was held down would have extream lag. You want the rocket to go one way its gonna take a second to reverse course. Like it was recording your mouse movement, then it was playing it back in slow motion. This made items like rocket and lazer beam almost unusable. they may be useful if you only have to use them for a second and don't need to aim beyond that, but if you need to steer a rocket around an obstacle it is completely unusable.