This shit is not acceptable for $4 million of crowd funding with countless delays. It's a 2.5D sidescroller. The second you give it any sympathy towards a product that was borderline bait and switch, you only encourage mediocre products. The point of this Kickstarter was to show fans' love for a dying franchise with a spiritual successor, yet it failed to even come close to the standards of good game design, especially from such stars.
Not only has Keiji Inafune damaged his own name, but he is bringing down Kickstarter and its integrity for other developers. OUYA was also a huge waste, and I'm suspicious of how Shenmue 3 is going to turn out.
So you're right, it's not a bad game. It's a product that will plague an entire website, legacy, and fans.
That aside, the game itself isn't bad / doesn't warrant the scores. It's average.