Xabi is a good coach so far, he managed to make a team that had never won the Bundesliga title get it even with a questionable team composition. For me, his achievements are the result of luck meeting the right time, when they won the Bundesliga, Bayern Munich & Borussia Dortmund were in chaotic form, just look at second place in the standings, is it Bayern Munich or Borussia Dortmund? no, it's Stuttgart.
There will be no more Bundesliga titles for Bayer Leverkusen in the future, no more.
Alonso was able to bring Leverkusen to make history for the first time in the Bundesliga after 120 years, Leverkusen performance and performance this season is indeed very extraordinary and even an achievement and record of a club that may be difficult for a strong team to achieve later, winning the championship trophy by going unbeaten in one Bundesliga season is not an easy thing, Moreover, Leverkusen has not had a player who has indeed stood out in their squad since the beginning of the season, but Alonso was able to do a miracle by bringing Leverkusen to win the Bundesliga for the first time and also the DFB Pokal.
Apart from Leverkusen very consistent performance, of course we can say that this season Leverkusen is greatly helped by the decline in the performance of other teams in the Bundesliga, the revival of Leverkusen this season actually coincides with the deterioration of Bayern Munich current performance, so that indeed they do not get a relatively strong resistance in the league, next season of course we will see how Alonso and Leverkusen are able to maintain their performance like this season if Bayern Munich bounces back like the previous seasons.