I don't really have a problem with the sound or production either. When it came out I was 17 and didn't give it much thought, now that I'm older it sounds like an old friend and anything else just wouldn't be right.
As for the length of the album, yeah it's a little short but ANY album with Hang Em High, Secrets, Little Guitars, The Full Bug, Big Bad Bill and Where Have All the Good Times Gone on it has done yeoman's work.