If he plays it has to be on the right. There is no way we are able to accomodate a traditional no.10 and two strikers (Richarlison and DCL).
The only way we can accomodate him is out wide in a 433 with a midfield 3 behind him.
The no.10 playmaker role is outdated and has no place in the modern premier league. You need flexibility with pacy players who can play across the front line. No good side plays with a no,10 anymore.
You can still play a quasi-number 10 if he sits a bit deeper and is mobile enough to get in the box - OR you have a very adapt box-to-box midfielder.
I have doubts Doucoure is that. In fact, I'm sure he isn't. Positionally he isn't right. So that's the reason we can't play Rodriguez centrally really, because we'd get picked apart constantly on the break and have Allan overloaded.
So yeah, comes to the same thing; in England there's little realistic way to play Rodriguez centrally apart from as a Plan B.