I think he said changes because of the injuries we had. Pereyra and Asamoah were supposed to be key players from the bench yet they both missed more than half a season. Selling them and Hernanes and adding a quality 4th CM would be the logical thing to do now
Kovacic (eventually Andre Gomes but I think Kovacic would be easier to get)
Tonelli, or some other cheap CB
If Evra goes, De Sciglio would be LB and Vrsaljko as RB
CM in case Sturaro/Asamoah/Pereyra leave
Mandragora/Marrone for HG/depth
one of Sturaro, Asamoah or Pereyra could go, so we'd replace that one with someone else (less injury prone maybe?)
I would say Oscar could be an option, so then Pogba most probably goes back to LCM and Oscar as AM? Sounds realistic if Conte considers him for sale.
I expect a rather quiet mercato unlike many here. We've done our spending last year, this year we need only adjustments.
EDIT: I'll add Mandragora/Marrone to the list for HG rule or simply for depth.