I’m not totally disagreeing here but how to use him..? He can’t take on the Republic himself. And if he kills all the main bad guys the storylines have nowhere to go. And at this point he’s too old to do anything anyways (except for what he did in this one).
It makes him more interesting as a character to be conflicted, bitter, etc. Either way the people view him as a legend, so he inspires everyone.
If they did use him differently, the storyline for the whole movie would have to be entirely different.
I don’t know what Lucas would have done with these movies, but I personally thought his take on 1-3 effing sucked. A few good moments but overall a bore fest.