Young players are good, but you understand that it will take a long time for them to get the necessary experience, and Barcelona needs results now. They are trying to attract new players, they decided not to extend Felix's loan because of this, that is, they are doing something. They can also try to apply Real's strategy and attract players with free agent status to the team, for some teams this is also a working strategy. But Barcelona does not have big problems, they have a balanced team that is ready for the new season.
What Barcelona are implementing at the moment is very suitable because they also need much better results than last season and at least Barcelona can win La Liga again next season. So implementing a strategy of bringing in new players and also strengthening the young players that are already there will be a very good option for Barcelona. And from what you say it also makes more sense because Barcelona not only need young players but also need players who already have experience so that the depth of their squad can be quite balanced.
There are targets that they must achieve in the near future and there are targets that they must achieve in the long term, so a team must prepare for that very well. This is all balanced between the short term and the long term, so far Barcelona can prepare for that, yes even though they still have problems that have not been resolved. But at least they are still trying to make the best of it next season. Actually, they are very capable of having the strength that Real Madrid has, because there are many players who I am sure will not refuse if invited to join them. But the problem is their financial situation does not allow them to do all that, so they have to be able to spend as little money as possible but still have a good squad.