Al Hilal have completed the signing of Theo Hernandez from Ac Milan, that is a very good signing for them IMO, with Cancelo at right back and now Theo Hernandez at left back, they'll be a stronger team than they were. Al Hilal have been eliminated from the CWC, but what a tournament they had, the highlight of it all was eliminating Manchester City from the competition. With what we saw from Al Hilal in the CWC, it is obvious that football in the Saudi league is definitely improving.
Something about some players is that they feel they can deceive the fans by saying they don't want to make a move out of a particular club, at first when the Al Hilal came knocking for this player I think last month or so, Theo declined the move to the Saudi side Al Hilal and now he went off like he never said no at first.
I feel Ac Milan never wanted to continue working with the player as soon as they strip him off the captain arm ban, can't remember what happened but we all saw how he was gradually loosing form like his mind isn't with the club any longer. Well, is a good move with the way the Al Hilal side displayed in this CWC could be the reason why he joined and they'll still continue pushing to get more players, having seen how good they are to even battle it out against Man City without minding how strong they (Man City) are it still didn't stop them, like you said, Theo operating on the left back would strengthen the team and the back line will be solid to face any team.