Xavi worked quite efficiently and quickly because the certainty of Busquets leaving was final for his decision and of course with Gundogan in their squad it was clear this would have a positive impact.
Gundogan's leadership spirit and calmness need not be questioned even though it is impossible for him to immediately become captain but still with him and the experience he has it is clear that this is very good for Barcelona....
Xavi has a long history with Barcelona and he is also very familiar with the characteristics of his game throughout the game. so when he comes back and tries to fix Barcelona from the bottom he knows quite a lot about what's going on in Barcelona, what needs to be done and also various evaluations for that. we'll see how Barcelona after Ada Xavi they were able to get up and have started to approach Barcelona's very good style of play and won La Liga last season. and this is not easy because we all know that Barcelona competed like that for a few early days so they lacked a lot of points.
Actually saying whether he is capable or not in these 2 seasons has been the answer on how he can make Barcelona improve and improve himself has been Xavi's answer even though he did have a few failures such as in the Champions League.
Now it's just a matter of how he changes himself for the better because there is still some work he has to do to make Barcelona better this season, especially with conditions where they have to try to be more consistent in a better competition, in this case the Champions League, because if they fail again then this will reap a lot of criticism that is after the previous 2 seasons they failed.
For La Liga positions everything will still be the same with the same rivals as Madrid and Atletico and indeed that will not change because the competition in La Liga for the championship position only revolves around these 3 clubs it seems.