I don't think they can fix Ninja Gaiden 3 for the Wii U because they changed from first two games being multiple weapons and user-choice and smart enemies requiring strategic combat to a single weapon game.
The biggest complain in the reviews for 3rd game unanimously was repetitive tedious gameplay that is not challenging.
The biggest praise in any review for past games was challenge and variety of weapons/enemies.
The biggest complain of past games being camera and non-sense story still exist in 3rd game. So basically instead of fixing the thing people didn't like in the past games, they broke the core strength of the past games.
Even on the Sigma editions, what Team Ninja added without Itagaki as game director was more variety by adding new character chapters, weapons, challenge arenas where different combination of enemies mixed in for unique challenges. I don't know why they didn't realize why it worked and went ahead and broke it thinking like newb developers that by tieing story to weapon and making it single weapon they would somehow improve the overall game.