Despite Barcelona's good form in the previous season I still have a feeling that it will be very difficult for them to win the Champions League, I think they will reach the semi-finals at most. It's like they're not ready for it anyway, it's hard to explain it. Nevertheless, we will have to see how they start their season in general, and the group stage in particular is worth paying attention to
I agree with your opinion but an experienced team like Barcelona can surprise you at any time especially if they manage to maintain their top form next season. Xavi has managed his team and players very well, it has motivated all players to work optimally for the benefit of the team.
I believe Barcelona have less chance than Manchester City, Real Madrid, Bayern Munich and or maybe PSG, but Xavi has quality and he also has good squad depth to look forward to. Of course I can't fully expect Barcelona to appear in the Champions League final next season and win the title, but nothing is impossible.