Yeah it does feel a lot like we are just gonna have massive CBs and a keeper to claim crosses and then try to outplay everyone.
I personally don't like the idea of ELF - Diarra and a 10 and think it was just to be more attacking vs a very very poor opponent in shields.
I think it would be odd for Le bris to specifically say Sadiki can play as a lone 6 if we weren't going to use one ever, so imo we will switch between a 433 with a 6 and a 4231 using a 10.
That seems the mostly likely to me aswell, with the set up changing between the two depending on opposition etc.