If we manage to do this then we should see a better indication of what Arteta wants us to become in terms of shape and roles - do we stick with the 4231 or do we switch to a 433 and become more like 'MC/Barca lite'.
Odegaard is the better CAM/#10 ahead of ESR at this point, but can also play effectively as CMA and from the flank. ESR can also play from the flank at least so we could have a very flexible 3 of Saka - Odegaard - ESR if we retain the 4231. If also gives us depth of the bench if we retain both Laca and PEA as starters, which then alleviates our concerns regarding player burn-out/injuries re Saka and ESR.
Because Odegaard can play as CM and is strong defensively, it also opens up the prospects of switching to a 433. Again whilst the 'ideal' scenario may be for both Odegaard and ESR to start alongside each other, it may be more effective to look to rotate them with each other to begin with at least until Odegaard gets match fit. Alternatively if we are to consider depth/burn-out etc then again we could see a rotation of ESR/Saka/Odegaard across both the inverted winger/hybrid #8/10 positions.
EDIT - the idea of Odegaard joining the likes of Tierney, Saka, ESR, Martinelli, PEA, Partey, Gabriel even on loan should be very exciting. Not only to us supporters but also to the players and other potential signings in the summer.