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I just want to add, before that Xavi only used Busquets. after a series of defeats in the Champions League, plus several injured players. Xavi has difficulty getting around these conditions. after being eliminated in the Champions League, Xavi's focus was only on La Liga. which in the end, he found a new system that uses Busquets and De Jong as a pivot. although it cannot be said to be ideal and solid, it seems that this combination has changed Barcelona's game. Xavi found the rhythm of the game for his team, plus the players who were injured recovered to return to their respective positions. as a result, Barcelona can win the La Liga trophy. at least, a special gift for them even though they can't yet be categorized as a very strong team.
In this summer window, Barcelona brought in several newcomers. at least, add depth to the squad of his care team. it's just that some players, such as Oriol Romeu, haven't found their rhythm yet. it could be, because Xavi is trying to experiment with his new system. however, this team should be tougher than last season. unfortunately, Dembele will leave even though Barcelona still have a replacement. my estimation, at least Barcelona should be able to qualify from the round of the top 16. yes, even that depends on which team will be their opponent later. let's wait, and I just hope they show their best game.
I also noticed that condition with Barcelona in the Champions League last season, but one of the other factors that made them fail was that Barcelona joined the group of hell last season. Regarding the Champions League next season, of course Barcelona has a higher chance of qualifying for the round of 16 (at least), but it still depends on who will be their opponent in the group stage. If Barcelona are going to be in the group of hell again, I think it's difficult to see them qualify for the higher stages.
About Barcelona, I know they have changed. Xavi is responsible for improving the quality of Barcelona in the last 2 seasons, but I agree that Xavi has not been able to convince many of his fans about the Champions League at the moment. Dembele will join PSG and a verbal agreement has been reached, it will cost Barcelona their firepower next season.