I am going to look for logic though, because I want a bit of logic in all things. So Darth Vader can choke people without even touching them, where is the logic? Well, it is explained that he taps into a magical energy known as the force. That is good enough for me.

Most things in Star Wars had some kind of logic behind it, why should logic suddenly go out the window as soon as the Emporer dies?

(I agree, the Ewoks defeating the Imperials with sticks and stones was no logical, and it has always bothered me. But the Rebels are out there fighting too, so it can be reasoned that the Ewoks were more of a distraction than anything. Ultimately, the whole Ewok battle is a very minor part of the whole trilogy. The Han rescue was the other bit of the that was devoid of logic.)

I consider the logical lapses of ROTJ to be a major black mark on the trilogy. I'd like to assume the Imperial fleet simple retreated when they realized the Executor and the Death Star were lost. That would be a perfectly logical thing to do. No sense in waiting around to be dealt more damage. Why impose more illogical nonsense on the poor film by making assumptions when the end is left pretty vague?

I also don't believe the film needed a happy ending where the Empire was entirely defeated. The other two films didn't end that way. Movies about war can still end on a happy note even if the war doesn't end with the film.