Maybe. But then Baines can just take over set plays.Even if Carlo does'nt rate Bernard or Iwobi, they are still better in that area of the pitch than Siggy. When he came on today Bernard was pushed out on the right and just looked out of sorts because of it. I can only think that it must be to do with the set piece thing given that Digne is out at the moment.
My theory is he wants someone who is more of a midfielder sitting in front of Baines. Bernard/Iwobi will look to roam and make plays more frequently and Baines could end up exposed. Sigurdsson will just sit.