I also think PSG will never be banned from UCL. It seems that they would lose players of the caliber of Neymar in the competition. One thing is for you to ban Galatasaray, another completely different is to ban the PSG with Neymar, mbappé, Cavani, Verratti, Thiago Silva, etc.
On the contracting of Neymar and Mbappé, it is a type of business that directly influences a lot, not just the ones involved. PSG when he hired Ibra, was aimed at establishing himself and creating a national hegemony and succeeded. Time to change the level and Neymar was the definitive step towards the real attempt of dominance: the UEFA Champions League. Anyway, the PSG hires a player who would be starting in any club, media focus of the attraction that needed. Top 3 (?) Of the world, the successor of the generation Messi / Cristiano Ronaldo. With the signings of Alves, Mbappé and Neymar, he makes a powerful leap in the famous European top-5 (clubs that can win the UCL). It can hit the front, in theory, with either. It has arguments for this.