OK so on topic question.

One ofy players has really taken a shine and started investing experience into move more than any other players I've had.

He currently has 2 magnitude, 3 strength, 2 range and the control upgrade on 2 force dice.

With a lucky roll of 2 pips on each dice am I right in thinking he could lift 3 silhouette 2 items (says rocks) and auto-fire hurl them at a target?

1 pip to activate power

1 pip for magnitude

1 pip for strength

1 pip for range?

Obviously he'did have to make a discipline roll to actually hit the target but with a successful for that's 3x 20 damage (before soak)

Correct.

However, he'd also need a Force Rating of at least 2 to even have a chance of pulling all that off, and a Force Rating of at least 3 to be able to it with any sort of regularity.

Plus, this would also be a case of the fluff of the setting balancing the crunch, in that doing such obvious feats of Force usage is going to draw all sorts of negative attention. Remember that by the time frame in which the books are set (that of the original films), the Empire has had 20 years to spread propaganda about the "evils" of the Jedi Knights and how their "decadent" Order stole babies from parents and plotted to usurp the rightful government by staging a coup with the devastating Clone Wars as the justification, with the Jedi even going so far as to try and manipulate both sides to their advantage. There is an entire generation of adults that have grown up under the Empire's rule, and given how sparse Jedi were before the Clone Wars broke out, there's not much reason for them to believe the anti-Jedi propaganda is false.

So if your PC starts openly flaunting their telekinetic might in parts of space that are even remotely civilized, they can expect somebody to fink them out to the Empire, and there's a good chance that folks that otherwise might have been potential allies will turn against the party for having one of those "mind-reading, spoon-bending freaks" in their midst. And then there's the "good citizens" that will alert the nearest available Imperial representative about the deviant, and the last thing Force users need much less want is the Empire taking a vested interest in their activities.