If the reviewers are basing it just on gameplay, a 6 to 7 is probably correct.
However, the fans will probably give it fives and fours for not being a true Metroid.
Though from what Ive seen of it, I still dont think it deserves a 7 or higher.
Its probably rated right, at the 60+ something it at now.
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071