I like this idea. Experienced jedi and sith will easily push a rocket back at even ARCs with the random launch time. They have it grown to their backbone and I personally haven't failed to push back a rocket that hasn't been fired out of my range of hearing and from a blind spot for years.
This would also enable rocket users to work alone better. At the moment the only way they can get anything done is firing so called 'stealth rockets', out of hearing range and from where enemy force users can't see it coming from. The only other way to actually make rockets worthwhile in the presence of jedi and sith is to have a good teammate do rocket tennis for you.
(Also if you currently find rockets to be useless, do rocket tennis with your ally jedi. It works, it doesn't take too long to learn to do, just position yourself well and practice timing against enemy pushes)
And as stated above by other users, rocket users playing the role of a feinter would be very nice. Grenades can't really do the same trick, a jedi with good reflexes can push them back any time.
This could be implemented for mandos too, even though they only get one rocket. Although I'd like to see them get an extra upgrade that enables a homing rocket that would be slower than normal to make it easier to shoot down.
