The only way he plays in the middle is if we play JWP/Davis on the flank. We won't play three creative players behind Gabbi. I agree Boufal would be more threatening as a no.10 where he can go in both directions, though, according to Pellegrino, wing play is one of our strengths (he hasn't seen our final ball it would seem). As such, can't see us moving away from having our creative players on the flanks, doubled up with our aggressive full back play, anytime soon. That said JWP would be a better fit on the right than Davis.
In Puel's defense, he did let the three behind the lone striker roam and interchange (at least in the early days). As yet, not really seen that from Pellegrino.