One DoP would be much more efficient with shooting back to back.
That’s not the precedent, each movie in this franchise is different from the last. McQuarrie has said himself that he’s committed to that tenet of the franchise.
I’m sure there’s a way you can do a two part production with two different DPs. Have them prep both movies separately but simultaneously. You’d probably need them to agree on the camera dept. personnel, maybe have them switch out ACs for when they come on. It’s doable.