Ehm....Moyes was personally involved, speaking to both players on the phone over the summer, and you quite literally have a summer full of quotes from Moyes underlying the importance of trying to sign them until the end. Connecting the dots isn't all that complicated.
Pinning this solely on Woodward, and pretending that all Moyes did was hand him a list of mint players and all he heard back was how Woodward was confident of fixing it and that the players would be signing, no problems on the horizon, is pretty fecking absurd. Woodward had just taken on the role, you have a new manager who is insisting that both players are ready to join and that we should stick with trying to sign them until the end, and you expect Woodward to go against him? Good luck.
In terms of McTominay, at the time he wasn't ready and Mourinho used him to prove a point, like when he played him as a defender while leaving Bailly on the bench...The player he is today has very little to do with the way he was used under Mourinho.