Sawyers, Gallagher and Livermore may line up together at some points, but I’d be very surprised if Bilic spends much time with a midfield including no Livermore or Harper. Gallagher, Sawyers, Pereira and Krovinovic are all creative midfielders. Pereira and maybe even Gallagher have a bit of bite in their tackle, but it isn’t their natural game to shield the defence. I’ve said it a few times already, but when Mowbray tried to go a season with Brunt, Morrison, Valero, Koren and Teixeira, we were easy on the eye but ended up finishing bottom of the league. We only really clicked at the end of the season when we bought in Mulumbu, Dorrans and Menseguez, who all had clearly defined roles.
Bilic knows Livermore is the defensive midfielder in the team, so expect him to play alongside Gallagher, not be replaced by him.