^^ That's right. He's dynamic. He works his arse off. Rabiot thinks he's a box to box midfielder but doesn't realise what it really takes. It doesn't matter how strong you are or how calm on the ball you can be, you have to both make yourself available and useful to your forwards and cover for your back line.
Matuidi does it with gut running, Pogba did it with a mix of athleticism and flair, Vidal could do everything, Khedira and Marchisio were highly intelligent at reading play.
I've seen glimpses of Bentancur developing a box to box ability but Rabiot hasn't shown it once this season.