I think that even if they have the best trident in the world, they are still very relaxed, I know that Messi has been criticized a lot, especially when Mbappé gave up the penalty kick that Messi missed, this has caused a lot of controversy, especially for PSG fans who have been lately very demanding, the French League has already been practically won, but when Mbappé leaves, which is a fact, will there be other repercussions for PSG?
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Of course the impact for PSG when they lost Mbappe was to lose their goalscorer. PSG have sufficient financial means to get another player but maybe they will not get a player equal to Mbappe. He is a long-term project for any team that manages to sign him but PSG must be prepared to let him go before the season end if they fail to progress to the next round in the Champions League.
About Messi I feel he is still doing well with PSG even though on many occasions he has failed to score against the opponent. Finally, Messi failed to execute a penalty against Real Madrid because his shot was easily read by Courtois. But it's not a big problem because to be honest Neymar, Mbappe also failed to do so.
About the penalty, I think it would have been better if Neymar or Mbappe Took the penalty because I think the conversion rate of Lionel Messi of penalties are white bad. And I think that Lionel Messi, after moving to PSG has certainly lost his flair, but he still has a lot to provide for PSG.
PSG should really be ready to accept that their goal scorer Mbappe can leave the team anytime. They should also make their future plans keeping that in mind. And you know, they have enough money to buy another great Striker for the team.
But, I think there really should think about which player will be the best for the team and also will have good chemistry with the rest of the squad rather than thinking about getting the most expensive or for a really famous player.