This time PSG is lucky because they can finally have better performance in the Champions League after years of failing it. PSG this time got a coach like Enrique who can help this team a lot because of the experience he has from Barcelona. But other than this PSG is going to play against Arsnela today and this match won't be hard for PSG because Arsenal also had bad performances usually in the Champions League games and this can make a far better situation for PSG in this match however I don't think if Arteta and his players will let PSG take points easily in this match.
PSG having a better run this time around isn't guaranteed yet. Sure they look like a good team, and they look like a lot better than what they were expected to do which is why I believe that they are looking great at this time, but that doesn't mean that they won't lose. We are going to probably see them be at last sixteen anyways, which they always reached and losing Mbappe will not change that and they will be there anyways. However, last sixteen is the only place I can see them reach for sure, after last sixteen round, we are talking about totally random matchups.
Depending on who they face, they may do better or do worse and we should not be focusing on anything else. They have a tough time with these opponents if they face someone harder, so maybe they won't do that well. Luis Enrique is a great manager there is no doubt about that, he is a famous one and he did well before, but I believe that he is not going to end up winning UCL with this PSG team, not possible.