Maddison would add a lot of quality. A lot of what we've been missing in midfield.
Not sure how we'd line up though.
Maybe
Pepe-Maddison-Partey-Saka
----------ESR
---------Auba
07/08 style?
Or
Sambi-Partey-Maddison
---Pepe-Auba-Saka
Without the newly-minted #10.
Not sure any of these line-ups would actually work. Looks like there's decent amount of quality, but we have to factor in Arteta and the fact that Auba is no longer what he used to be.
Actually, after considering Arteta and injuries, we'd probably end up looking like this:
----Xhaka-Elneny
Saka-Maddison-Auba
--------Laca
Arteta would also somehow find a way to start Willian over Saka or Maddison for the first 3-4 months.