There wasn't really any time to help him develop in the centre, also Philips was still being tested as well, so I can see why nobody thought to try it yet.
Mahrez still retained alot of what him at Leicester, and contributed loads of goals and assists and getting past his man with his dribblings.
I'm not knocking Grealish on the wing, vital to the treble last season, helps control the tempo and so on.
What I'm saying is that very clearly, Doku is the future of our LW, I want him to be our starter there next season.
I have seen far too much good stuff from Doku that I know we won't get from Grealish, and he will only get better.
Grealish can still rotate with Doku on the wing, but like I said (and I think you said as well), Grealish does have alot of good qualities, that can be translated to the centre, meaning he COULD play with Doku together. I think it's a good idea for next season imo.
This also give Grealish more than one area on the pitch to play.