For a matter of fact, the best Star Wars movies are the ones that he did not direct himself.
And in general I have heard a lot of people complain about the bad acting in the Star Wars prequels.
I watched them all in German, and still do, because I am just used to them in German, and I never noticed any bad acting.
Sometimes it is good to have a German dub. Bad acting can be made better. Because the German dub actors are super experienced and dub practically every movie there is, the acting of a lot of actors is probably made a whole lot better.