As an exhibition of how useful Treknology is, I'm going to go through the original trilogy, scene by scene, and count the number of times that the plot would have been derailed had Vader simply had the Enterprise at his beck and call doing errands for him. Nothing to do with overwhelming firepower, mind, just all the little pesky details.
- Three minutes into the movie, the Rebel blockade runner's main reactor is shut down. Its shields may have been compromised even before that. Darth Vader beams the Rebels directly to the brig. Two minutes later, a feminine hand would have slipped a little floppy disk (well, something flat and containing important Death Star data) into Artoo from an unseen bend in the corridor as C3P0 wonders where his short counterpart got lost; unfortunately, Princess Leia is now in an isolation cell.
- Transporters would have been able to end the movie again when the stormtroopers located the Falcon - while people were just walking aboard. Han, the pilot, wasn't even on the ship yet.
- The Falcon is able to nimbly fly right past Star Destroyers. Not so the smaller (and far nimbler) Enterprise - whose tractor beam has a long enough range to grab the Falcon at the sort of distances it was willing to close with them. In Star Trek, halting a small ship in its tracks is common for larger vessels trying to capture them. That's to say nothing of the fact that it would have also been able to blow the Falcon out of the sky with its superior accuracy - making three different ways in which the Imperials would have been able to stop the Death Star plans from falling into the hands of Rebels in a single incident.
- Speaking of tractor beams grabbing the Falcon, we come to the next scene in which the Enterprise could have saved the Empire: Han and company hiding inside the Falcon. The Enterprise stationed as a Death Star escort would be within good ST sensor range of the Falcon, allowing the Imperials to track exactly what was happening with the life signs aboard the ship - or, again, simply beam them out and into the brig the moment Han powered down the shields to make it look good. (Indeed, had the stormtrooper simply had a tricorder chirp at him warning him he was about to get jumped from behind - as Data's did in Nemesis - this ploy would not have worked.)
- We now come to Yavin IV. Here, a small passel of Rebel fighters engages the Death Star, taking more than five minutes to approach. The Enterprise would have been able to detect these (providing a report of the incoming starfighters well before the Imperials took any notice of them) and intercept at Darth Vader's command before they even began the trench run; here, it is important to note that Vader did not share Tarkin's confidence in the invulnerability of his station, and we said it would be at Vader's beck and call.
- Having just one more ship - and, importantly, a fast agile ship with long-range tractor beams - would have allowed the Empire to make a much cleaner sweep of the fleeing Rebels right in orbit. The Falcon was a priority target and only narrowly evaded the slow-turning ISDs, just as it did in escaping Tatooine.
- In the asteroid field, the Falcon hides inside an asteroid. The Enterprise, however, would have been able to track the Falcon on sensors, even from outside the belt.
- When the Falcon latches onto the Star Destroyer, the Enterprise would know exactly where it went - unlike the poor confused slobs on the ISD.
- If you have a transporter on hand, why march prisoners over half of Cloud City? Beam them straight to your holding cells. Lando never even has a chance to renege on his deal with the Imperials; Chewbacca and Leia are imprisoned immediately.
- When Luke takes a dive down the airshaft: *chirp* "There should be a human lifesign somewhere below my position, falling rapidly. Beam him aboard. I want him alive."
- On Bespin, the Falcon performs another act of daring flight. Unfortunately, Imperial incompetence is stunning in this case - the Falcon is literally right in front of the Executor's nose when it jumps into hyperspace. Perhaps they might have behaved differently if they knew - as the crew of the Enterprise would from their sensors - that the Falcon was powering its hyperdrive up just fine.
- Locating and capturing Rebels on a forest moon: As simple as telling the Enterprise to beam up the Rebels from their landing site. They never even get to meet the Ewoks.
