The fact that there is no Yamal is not the reason for the defeat and draw in the last two matches by Barcelona. Revisit the matches and you will see that they had mistakes elsewhere, moreover Yamal is not Barcelona's most prolific scorer, he is an important player in the squad but not the main one. Real are actually on Barcelona's heels, even with their game in hand it's really hard to predict what the outcome will be at the end of the season.
The draws and defeats in the more recent matches are not something which can be viewed that there is no need for one participant, how crucial he may well be. Football is a team game hence whenever a team performs poorly what should be scrutinised is how the team utilised the techniques formulated and the opportunities availed. A little inaccuracy or disorganisation at some point can lead to a significant influence on the result. We have to ensure all components of the team can assist one other to cover for the gaps as they come about.
On the other hand, as it is similar to the case with Real Madrid, and the end of the season means crazy games the best thing now is to stay calm and do everything possible to achieve the best result. Some things need to be better and there is still time to do it and find the new better rhythm we need. Goals can be set related to finishing, organisation in the midfield and communication in the defence line. Each match is also a learning process, so even when the season is over, it can be considered very successful. In this case, the role is to foster team spirit so that everyone to do his per her part to ensure that the players and the off the field workers work as a team.