I've said it before. I wouldn't have him back as manager as he was a very limited manager and his history of sidelining half the team through injury via his training methods has followed him everywhere. That and he was slow to react with subs and made subs after the inevitable happened instead of to prevent it, even then they were baffling like he used a tombola to decide who was going off and coming on.
That said, I'd have him back as Director of Football. He's got a good eye for a player and isn't scared of foreign markets, he knows and understands developing youth products and has good connections at acdemy levels, and he focuses more on coaching and developing players than systems, which is where an expectancy would be to sign a player for £3mil, coach and develop them then sell them for 3-4 times what we paid for them.
He would be the missing link between the academy, the first team and the board and I trust him with money far more than I'd ever trust Wilder.