I just finished it and was a bit underwhelmed. There is an amazing game there ruined by a lot of tangents with subpar game design. It was like they were not confident enough in their core gameplay and just kept adding mediocre noise instead of streamlining the main appeal. I just wanted to dive and run a restaurant and the game kept forcing me to do other things. Very frustrating.
7.5 is a high score, even if not the best game they have ever played. A low score would be something well below average (average being 5 in this case).