It passed you by. Before his injury he was outstanding for Villa, especially in the first 10-15 games of the season. Go back and have a look at MOTD and you'll see the pundits lavishing praise on him. In one episode I remember they actually had a segment highlighting why he was so important to the team.
Then there was the reports that Man Utd were very interested in him. I'm not sure I trust the veracity of them, but they are not completely unbelievable and it was so high profile I'm surprised you completely missed it.
Finally, he's scored 7 goals in his last 5 Scotland starts.
John McGinn is a player.