Firstly, they're written some songs as though they were just 18 years old. Cosmos Rockin' and Surf's Up prove my point. Rodgers' "suck it to me" at the end of the first mentioned song always makes me cringe.
Secondly, it's not that diverse. I got into Queen because they had so much different stuff going on in each album, but it's a bit bland. And yeah, that's about it. Other than that it's a decent album.