I think you have to expect some resistance, in a sort of "actually Ross, we've moved on and everything is great now" kind of way. and a "you never called as much as I wanted anyway".
Except we've been getting bummed by everyone who comes over and the weaknesses in the team are Ross' strengths. Even if we are hoping to get better players long term, in the short term, he's got what we need. And longer term, he will still be very useful, even when we have better options.
Barkley's position was always love Everton, hate Koeman. Koeman was threatening to sell him, imagine him saying that to Lukaku as a means to get him to stay.