You don't see how Keita and Fabinho essentially replacing one midfield position is a significant change? Especially relative to other top teams in the league it's a massive change.
But it's okay to stick your head in the sand over it. I mean the difference between a starting midfield of Fabinho, Keita and Henderson/Wijnaldum with Wijnaldum, Milner, Lallana and others available as depth isn't much of a difference from a midfield of Henderson, Milner and Ox with Can and Wijnaldum (was injured/sick) as depth.