Agree, he played really well in 20/21, he played great in the regular season in 22 but he did struggle in the playoffs and it is insane that Monty basically didn't care about the fractured relationship. Him not connecting with Ayton all off season is just absurd. He was the head coach, his job is to build a team and it's clear that his biggest weakness was managing personalities.
Hopefully Vogel can get through to Ayton, because you are right, he is going to be hard to replace. If we trade him for a couple role players and a late pick then we're likely taking a big step backwards.
As for the Booker line, I know he isn't like Derozan, his playoff numbers obliterate DeMarr, and I'd hope he isn't Kobe either. Ball hogging and playing slow and putting up low percentages isn't going to win any titles in the 2020s. Kobe had plenty of horror show elimination games.