When a player is no longer committed to a club, the best thing to do is to allow him leave, else it would affect the clubs performance, his individual performance could ruin games for them and with Ederson playing in a strategic position it's best to replace him now that a better option is available and even cheaper, Pep made the right decision of that may be the case, it's better to let Ederson leave than trying to force him to stay.
Pep Guardiola and Ederson relationship seems over after his name not entering at squad list against Wolves and rumor talk him will move to Galatasaray. However Ederson's performance not really bad for awhile and have chance to play well for this season but Manchester City have signed new goal keeper make him loss regular position.
That's one mistake Newcastle is making with Isak, if they had initially allowed him knave it won't had cause a scandal in the team currently, moreover they'll receive a huge offer for Isak so I wonder why they're still allowing it cause an issue for them. Anyways it seen Galatasaray are really pushing hard to sign Ederson which means Donnarumma would be City's player soon.
Can't predicting internal conflict between Newcastle United and Alexander Isak will have sad or happy ending, they player have decision for leaving Newcastle but the management won't him leave the team for this season. Liverpool still patience waiting for negotiation agreement deal but Newcastle still waiting his player change decision want to stay with club.