That was an exciting end to the transfer window. It was the first window Edu handled as the main man, complicated by the fact that Sanllehi was sacked halfway through, and I think there were both plusses and minuses in the end. I do think they screwed up some things - somehow Saliba's loan got fucked up at the last minute, we should have at least found somebody to take Sokratis for free, there was clear interest in Kolasinac but we couldn't close anything, and we really probably should have sold Balogun. But the two biggest transfers of the window came off and I think they'll be pretty transformative for the side.
The big picture is that we invested the lion's share of resources in two athletic, physical guys who also have very good ball skills to play in the 2x2 CB/CM box that is the pillar of any defense. If you're going to try to boss games in the Premier League and commit a lot of players forward in attack, you really need athletic players in those roles who cover a lot of ground and defend comfortably in one on one situations, otherwise you just get hammered in transitions. City hasn't really been the same since Kompany left and Fernandinho declined, Liverpool went up levels with Van Dijk and (to a lesser extent) Fabinho, etc. I'm not claiming that Partey and Gabriel will be of comparable quality but you can see why Arteta wants players with their profiles and to build the team from the spine outward.
There is a lot of speculation about these acquisitions facilitating a move to a four man backline and either a 4-3-3 or 4-2-3-1 setup, perhaps not immediately but certainly eventually once Partey is settled and we get past the tough away matches at the Etihad and Old Trafford. I think that's right but that two follow up questions are a bit more interesting. First, will we see Auba finally move back into the center forward role? We looked so much better and more fluid after Arteta made this switch against Sheffield United. Second, and relatedly, can we find a setup that is more balanced between left and right? The way we have been playing the 3-4-3 hybrid is incredibly left side oriented. Even when we flip in possession toward a four man backline, the guy that joins the midfield (Saka or AMN generally) really plays as an attacking left sided midfielder, with no comparable player on the right. My read on this is that Arteta liked the idea of clustering several of our best players - Tierney, Saka, Auba - closely together on the left so that they could combine well. But it has created a very lopsided team and made it really difficult for players on the right to get anything going. Auba through the middle would go a long way toward creating more balance.
The setup I'd like to see is more like the one we saw against Sheffield United, with Willian as either a 10 and a duel pivot of Partey/Ceballos behind or with Willian and Ceballos as twin 8s and Partey pulling the strings and cleaning up behind. Then have a frontline of Saka-Auba-Pepe, with Saka sometime switching with Willian, and a backline in which Tierney and Gabriel are mainstays when healthy and the RCB and RB positions flip between Luiz/Holding and Bellerin/AMN depending on matchups and tactics.
One implication of moving to Auba to the center is that will create more chances, but also more responsibility, for some of our young players. If Saka, Willian, and Pepe are the three most advanced players behind the striker, our depth options for those positions are going to be Nelson, Martinelli (when he comes back), Smith-Rowe, and Willock, with the added possibilities of Ozil returning from the dead, using Maitland-Niles in those roles in certain situations (like defending a lead), and of bringing on an additional striker in Laca or Eddie in other situations (like chasing a game). That is leaning pretty heavily on a group of players between the ages of 19-21 but I'd also be very happy to see them get the chances. We need to figure out whether guys like Smith-Rowe and Nelson have a future with us (Willock I'm pretty sure doesn't, Martinelli I'm confident does as long as his knee is OK) and if one of them pops this year it creates a ton of value as buying a top player next summer in those advanced positions is going to be expensive.
Overall, its an exciting time to be an Arsenal fan. I still think it'll be tough to get top four this year given the competition but the team is clearly going in the right direction while also putting into place a pretty solid foundation on which to keep building. We could plausibly see a regular starting team with 7/10 field players that are 25 and younger as of today, plus another 7 players that are significant contributors as key subs or rotational players (although Saliba may still get loaned). And half of those 14 came out of the academy at Hale End.
Saka (19)
Auba
Pepe (25)
Willian
Ceballos (24)
Partey
Tierney (23)
Gabriel (22)
Holding (25)
Bellerin (25)
Nketiah (21)
AMN (23)
Martinelli (19)
Nelson (20)
Smith-Rowe (20)
Saliba (19)
Willock (21)