Yeah, I think something between FM5 and 7 was to expect with number of cars and tracks. FM7 had it obviously much easier to have so many cars and tracks since not everything was build from scratch. A few more tracks at release would be nice but no way should you expect as much content as in FM7 considering how much new stuff they had to work on besides cars and tracks.
And what is this "critic ratings" supposed to tell us? Has noting to do with the Metascore or Opencritic.