For me, us signing Merino instead of an 8/10 hybrid type all but confirmed that we're looking at a double pivot with Ødegaard being more of a roaming #10 as the main plan.
We leaned too much on the right side last season. With Cala/Timber/Zinny on the left, Merino as the left-sided midfielder, and Ode roaming to connect with the left as well as the right, we'll be much more balanced.
We have backup plans, too, clearly. Ode is the most irreplacable player on the team in terms of the function he serves, but we managed his absence brilliantly by switching to a 4-4-2 with Havertz and Trossard ahead. It's kind of like a two false 9s approach. We needed to invent something to cover for Ode and we did.
Yeah, double pivot is something me and others have mentioned that could work quite well given Rice's and Merino's apparent engines and duel winning.
Also gets Calafiore more involved and makes us a lot less static.