Im pretty sure that PSG will buy "star" players if they failed again this year (UCL).
PSG has offered a crazy contract 3 times bigger than Madrid bid to Mbappe, the club financial must be healthy.
This year might be not the year for PSG, but next year will be different.
But who are these players then after they bought Neymar, Messi and Mbappe? I think it can't get any better than that if we talk about star players that they could buy. I think there isn't much they can do from here. But let's assume that their goal would be to bring in a whole new set of star players, who are these players then?
Honestly, PSG's performance in the UCL at the moment is not that good, even in Group F, even though they only succeeded in being in 2nd place after being held to a draw by Dortmund, in the round of 16, PSG will start the UCL against Real Sociedad, to be honest, the team the Spanish league has an unexpected surprise, PSG could be held to a draw or even lose.
I don't think PSG needs better players (even with neymar and messi remaining at PSG) currently, they already have a good squad, it's just that they don't have the luxury of having a good coach, that's all, that's what I thought.
I think what we have seen in the Champions League group consisting of PSG, Dortmund, Milan and Newcastle is that we overestimated the average performance level of that group. Everyone called it the group of death and I did it, too. But now it can be seen that all of the teams aren't as strong as we thought they are. Newcastle is falling behind in the Premier League, Dortmund is falling behind in the Bundesliga and AC Milan far behind the best teams in Serie A. PSG has no competition and that is the only reason why they dominate Ligue 1.
But I agree with you that PSG will now run into problems. Perhaps against Real Sociedad already, but I am sure if they can win this round, depending on who their opponent is most likely the quarterfinals will be the end of the Champions League season for them.