I am pretty sure that Diego Alonso is the new coach of Sevilla. I am not sure if this was a good decision or not. But I am sure that they were not performing as well as they should. The only saving price for the coach was that they were able to win the Europa League title the last season. But now we know that they are performing in the Champions League competition. And there is no way they are winning the Champions League.
At the same time the way they are playing right now, they also don't seem to be winning the La Liga title as well. If the decision was actually an improvement or not, we will be able to know that later. And I absolutely agreed that improvements are not going to come instantly.
Sevilla have taken a new dimension that suggests a quick revamping solution to their current situation and the new coach has a lot of work to push the club to a may stable position even though they should not dream of lifting the champion League Cup but at least their need to finish the new season in a strong position that will push them further in the quest to go further in the future.
I hope Sevilla will not end up suffering from what has affected some of the good clubs before who made mistakes of selecting the wrong member into the team that leading to a decline and backwards performance for them at most times.