Apparently the consensus among reviewers is "Playable, but that's about it. Nothing special, rides off MegaMan's past glories while failing to capture them."
In other words, "So Okay, It's Average." At BEST. Which, frankly, seems even worse than the game being a pile of feces, because with the budget they ended up getting (~$4 million) from Kickstarter backers and the amount of delays it got, it really has no business being average.
Backers, Inafune has made you his bitch. Next time, just say "No" to Kickstarter. I've never crowdfuned anything and I'm glad I don't. In my opinion, it's a very shady business tactic.
South Park said it best:"It's called crowd-funding, using the Internet to raise money without having to pay back your investors, a tactic that some believe is unfair and impersonal."