PSG is the best team in the Ligue1 no doubt and the presence of Mbappe in the team helped the PSG team to dominate the league throughout his stay in the club but now that he is no more the player of PSG, don't you think it will affect the performance of PSG in terms of maintaining the superiority of them dominating the league since they experienced a lot of poor performance last season despite winning the league, Mbappe was with the team last season but they recorded a lot of bad results from small clubs in the league so on this note, I think they can't enjoy dominance this season rather they will win the league with sweat if they will really win the league next season since they are yet to have a replacement for Mbappe but coming to the champions league competition,the team is not closer to the favourite for next season because they have no hit player that will push them the way Mbappe carried the team and it will be difficult for them to get to the round of 8 come next season. The coach will do a good work but he needs to bring in a better replacement for Mbappe otherwise his team will find it difficult to win any trophy next season.
Only Lionel Messi has been able to carry a team to the extent that the team becomes totally useless without him. Mbappe was PSG's best man. He was the best player in the team and he's already a PSG legend but he was not the only player in the team. His job is to score goals and those goals were provided for him by others, unlike Messi who had to create and score goals out of nothing.
Mbappe is to PSG what Ronaldo was to Real Madrid, another great piece of the team and that piece happens to be the best player in the team. If that piece is taken out, the team's performance will drop but with proper collective strength, the team will recover.
A mistake people make is looking for a replacement for a player. Some players are just too good that they cannot be replaced. Imagine Barcelona trying to replace Messi, it's impossible, but they can build their team in a way that the whole team would be solid, instead of relying on one man.
This is exactly what PSG needs to do. Get good midfielders and defenders, get good goal scorers in attack and winger that can score and create goals and they'll be good. There's no point trying to replace Mbappe.