Bayern Munich's first season under Tuchel was tough. He had local and European goals. Tuchel's management expected a treble, which may have been unrealistic.
Obviously that is unrealistic, because Tuchel who came to Bayern Munich was in the second half of last season or at the end of last season so that Tuchel did not have enough time to give the tactics he had to the players in the Bayern Munich team. So Bayern Munich still benefited greatly from the luck of the number of goals they had last season so they could still win the championship in the Bundesliga.
However, Dortmund's final-match disaster helped Tuchel defend the Bundesliga title. The club cannot continue to rely on such luck. Bayern must bolster their roster in the summer transfer window to win. Failure to do so could cost them the Bundesliga championship and the Champions League.
For next season, Tuchel must really prove himself in coaching and providing tactics to the Bayern Munich team so that he is not considered a bad coach for Bayern Munich. And now is the time for Tuchel to overhaul everything that is needed by the team so that Bayern Munich can stay strong in the Bundesliga and Champions League competitions. Because Dortmund itself will also remain strong next season in the Bundesliga.