A young player like Vitor Roque should not bother Barcelona, if Barcelona have a long-term plan. Barcelona should start planning for the long term now. Because it is unlikely that Barcelona will improve very quickly. Barcelona are now in a financial crisis. So Barcelona management can't make big funds to buy players. Barcelona cannot improve quickly without buying talented and experienced players.
Flick is an experienced coach. Flick should definitely plan for the long term and try to gradually stabilize the Barcelona squad. Barcelona may not be able to dominate La Liga next season, but if the team is stable, Barcelona can return to their old form and challenge any big team. Youngster Vitor Roque was added to the squad by Barcelona at a cost of 40 million. Flick should try to make a talented player like Roque more experienced.
It's true, Barcelona won't be able to develop quickly if they don't have brilliantly talented players, what's more, they have financial problems which are a burden, they can't bring in or recruit new players, indeed, Barcelona must fix their problems, after they fix the problems they have. It happens that maybe they can improve things by returning to their previous form which is known for being good in their game, and with them for next season I don't think they will be able to become Real Madrid's rivals even though I hope Barcelona can recover next season.
With the new coach, I hope to be able to bring Barcelona to better performance by developing to be better than before. I don't expect Barcelona to dominate next season, but I hope they can become Real Madrid's rivals again and provide tough competition to other teams, maybe with players who are not very experienced, Barcelona's performance will decline, but if their current coach is successful in educating and nurturing his players maybe they will become players who have brilliant talents.