If PSG want to succeed in the UCL this season, of course they have to get a good player for their front line to replace Messi's position and accompany Mbappe, even so, everything remains in the decision of the new PSG coach, Enrique, whether he really needs Osimhen in the PSG squad this season. this, we will see later, but I think PSG needs to adapt from a new coach to new players.
It takes time to adapt to new players as well as new coaches, that's why maybe we won't see PSG better than last season at the start of domestic league matches as well as the UCL championship later, in my eyes PSG is not a scary club in the UCL this season, I don't I'm sure they really made it this season. manchester city and Madrid will always be the favourites, Btw PSG qualified for the UCL this season
I don't think there is anything lacking in the current PSG squad despite being left behind by Leonel Messi. What Enrique needs to fix is the team mentality and the ego of their star players like Mbappe. Seeing Mbappe's behavior towards a club that doesn't want to extend his contract shows the fact that he is typically a difficult player to manage and feels bigger than the club. I think Enrique and the PSG management will take a firm stand against Mbappe if they can't keep his attitude and ego in check.
I agree with you that coaches and new players certainly need time to adapt to each other. Building emotional relationships and chemistry is very necessary for a solid squad when competing. I think if Enrique succeeds in suppressing the ego and galvanizing the mentality of PSG's players next season then the UCL will soon be closer to them, an extraordinary achievement if it actually materializes. Who knows Enrique can emulate the luck of Pep Guardiola who won the Champions League last season with Man City.