We will play a 4231 next season. It allows our best and most productive player (Bruno) to play in his most effective position (10).
I personally feel Ole wants a ball winner/box to box and a deep-lying playmaker - typically this is what you have in a double pivot. For example:
De Jong and Schone
Kimmich and Goretzka
Kroos and Khedira
Jorginho and Kante
He started with Matic and Pogba because Matic, whilst not having the dynamism of Fred and McTominay, does read the game well. This season; however, he has really seemed to struggle with the pace of the game and it's clear he and Pogba - who Ole wants as his deep-lying playmaker, don't compliment each other.
He now plays Fred and McTominay who are more ball winners than playmakers, therefore, whilst I would love Rice at the club, it would just mean having workmanlike midfielders, as opposed to cultured ones.
Don't get me wrong, that certainly has its perks. More often than not, we look much more solid as a unit when Fred and McTominay are in midfield. It allows our front four and full-backs to get forward, however, we do lack that player who can control the tempo of the game.
Ole did want Pogba to do this and it has worked at times but he's not great defensively and we've seen he's much more effective higher up.
Going forward, we definitely need a Kroos, Verratti, Jorginho, etc type of player in our team. That, with Fred or McTominay next to them would be fine.