You can't say that a movie is overrated "because of what it did to cinema" anyway. A movie is good or not. You like it or not. People praising SW in 1977 did not care if the movie would change cinema or not. It was a success because people loved the movie, that's all.

You can of course debate about the good and the bad things SW and its sequels/prequels brought to cinema, but that is not talking about the movies themselves.

Side personal note: anyone who thinks Jar Jar = R2D2 can't pretend to be a serious movie reviewer.