I think Arteta is a little more pragmatic than many of us realize, and in turn he'll default to players (and a structure) that emphasizes defense over offense. As such, I think we'll continue to see a blend of a 6/8 (a la Xhaka) alongside an 8/10 (Odegaard). For me, that means someone like Rice is likely there though they (or Xhaka) could cover for Partey as needed.
While I love the idea of ESR replacing Xhaka, I think it exposes a wide range of defensive issues. Without Xhaka we'll be noticeably worse off on set pieces, lose cover for both Zinchenko and LW, and lose some defensive nous.
In my mind, if we're looking to find another 5 goals per season we could better accomplish this by getting our mojo back on setpieces (the goals have dried up there), getting a few more PKs, and controlling a little more of the game.