I've read some great conspiracy theories on this forum in my time but this is one for the ages. So he was upset that he signed for United, then went into the season aware he'd have a grudge against him, so to get back at him he'd let Shaw do nothing and steal money from the club he was managing? What a way to get back at Shaw.
Also, your whole post makes no sense as his commitment off the pitch is being questioned, not his commitment on the pitch. Has he lost his influence? Maybe, but he won the league 2 years ago, very convincingly too. Guess we'll find out soon enough.
Also, is it not interesting to you that Shaw's commitment was questioned by the prior manager too, before he had his leg break?