Exactly, Jose doesn't play huge lumps up front, his big men strikers are always mobile and technically strong, Fellaini is the complete opposite of that.
I could see a 4-5-1 happening but it might be awkward as Chelsea are a counter attacking team as well, it could see the teams cancel each other out. I wouldn't be shocked to see him try 3 at the back again and try to push their wingback's back.
If the rumours about Rashford having travelled and being available are true I expect us to play like so.
----------------DDG---------------
---Tony---Small---Rojo---Shaw--
--------------Herrera--------------
--Mkhi--Fellaini--Pogba--Young--
-------------Rashford-------------
Mkhi and Young will be tucked in and cover the fullbacks. Mkhi and Poggers will join Rashford in attack where possible with Fellaini and Herrera keeping their shape.
I think both Mata and Carrick are the kind of players that need time on the ball and tend to surrender possession when pressured so he might keep them on the bench for this one.
Mkhi might move up top if Rashford is not fit and Blind might come on on the left wing with Young switching to the right.
That's my prediction at least.