Id argue his spell at Man U wasn't great, I would argue he has no feelings for Wales based on his playing career. All that said, I am not sure who they could have appointed
4 games as caretaker isn't exactly much to judge someone on, and it was two years ago. I think that's a harsh judgement, based on his lack of charisma. Much was made of his lack of commitment to friendlies, but in reality it mattered little. And certainly won't impact his managerial ability. He's massively respected within the game, that will count for far more.