And Luke went to Cloud City to help his friends. It doesn't matter how noble the intent is. Of course the Jedi don't want to rule. But what if they find themselves in a position where they have to rule? Where simply transitioning to a new government would only allow the rot at the core of the Republic to continue? I'm not saying that Yoda would have made himself Emperor or that the Jedi would have oppressed the galaxy. As you said, stepping in was a last resort but if the Jedi did go down that path, the temptation to use their power to set things right would have been all around them and it's a position they never should have been in. So when I say there should be no Jedi Order in the new movies, aside from the obvious lack of numbers Luke would have, he'd also have to learn the lessons of the old Order and ensure that his Jedi wouldn't be put in the same position, where they're serving a corrupt Senate, leading an army into a war based on a lie and allowing themselves to be wholly outplayed by their greatest enemy without them even knowing that enemy existed and was literally staring them in the face. The only way to make that happen is to remove the Jedi from the system altogether. This is the start of a brand new era for the Jedi. Luke may have trained a few in the 30 years since Endor but it's still very early days and he should still be figuring out how his Jedi are going to serve and how he will avoid the mistakes of his predecessors. That's not to say that the Jedi can't have a role. I imagine Luke would have some sort of advisory role within the Republic, but I don't think his Jedi should be the galactic peacekeepers the old Jedi were. There's a difference between turning to the Dark Side and being a Sith. Of course Mace wasn't a Sith. But neither was Luke when he almost struck Vader down. Remember, the choice Mace made was the same choice Obi-Wan and Yoda wanted Luke to make. They didn't want him to reason with Vader or plead with Vader to abandon the Emperor. They wanted Luke to kill Vader. Of course their reasons were just as was their cause. But it was still the wrong choice as Luke ultimately showed. Two decades after the fall of the Republic, the wisest and last of the old Jedi still had the same fear and were still blind to the simple truth that only Luke saw - there's still good in him. Now, I'm not saying that there was good in Palpatine or even that he should have been spared. Palpatine had to be stopped and the system couldn't be trusted to deal with him. But it was still a Jedi Knight acting out of fear and going against the Jedi Code. Remember what Palpatine said when Anakin killed Dooku - he was too dangerous to be left alive. Mace said the exact same thing about Palpatine. When a Jedi is thinking the same way as a Sith, you know there's something wrong. The callback with that line wasn't coincidental. In that moment, Mace let his fear consume him and he paid the price. In attempting to strike Palpatine down, Mace did the wrong thing for the right reason. In intervening, Anakin did the right thing for the wrong reason and in the end they both suffered. If Luke's Jedi are to survive and thrive, they can't be the same as the Jedi of old. The old Order may have lasted for thousands of years but it ended in utter failure.