Minna hasn't even played for us yet but you want him to replace one of our better performing defenders.Thats like saying its silly replacing Davies with Gomes is daft our record with Davies in the side is better with him than without.
No one is saying Keane hasn't improved on last season, but we've signed a likely better defender for big money whos sat on the bench and he needs to be given the chance to see how he does with Zouma.
If Mina comes in and bombs fair enough hook him and get Keane back in the starting 11 but he needs the chance to show what he's about imo otherwise there was zero point spending big money on him.
Players must know that if they play well they can trust the manager to reward their performances. If you get dropped even when playing well it will dent your confidence in the manager.
Young players like Davies , Kenny, Holgate, DCL and Lookman are still in learning mode and will be introduced into the team and taken out at different times.