I agree with you that it is like Bayern Munich is starting all over again since a new coach was brought to take over from Tuchel. If it was Tuchel, I will say that by now he has understood the players and their capabilities on how to use and mange them to bring good results for the club, because I will say that he was learning last season.
Kompany is on a new club which he is meeting these players for the first time to coach them and he will need time to learn about these players and their strengths to know how he can fit them into his game tactics, which will not be something easy. This is why I still think that next season will not be a victorious season for Bayern Munich because the other clubs are also ready to win the league.
Bundesliga title was won by Bayer Leverkusen because Bayern Munich wad not in form previous season. The Bavarians are here to stationed winning and we know it's up and running. Bayern Munich new coach will do better, I know this actual fact for sure. Vincent Kompany is classified mediocre because Bayern Munich happens to be the first top flight club to manage as coach and we know what's capable of, he will put in enough work for the purpose to succeed in his first season.
Even though Bayern performed very well in last season, they will not be able to overtake Leverkusen because Xabi fleet is unbeatable in the Budesliga. Kompany will lead Kane and his friends next season, it is clear that his managerial quality is in doubt, because he has only coached mediocre Premier League clubs before. However, with the squad he has at Bayern, it should make it easier for Kompany to carry out any strategy.
The target set by Bayern next season is very clear, to take over dominance by winning the Bundesliga trophy and eliminating Leverkusen. If Kompany fails to do so, I doubt management will keep him for more than one season. Likewise with their target in the Champions League, at least Kompany must be able to take Bayern through to the semifinals.
Kompany seems to be starting to move in the transfer window, several players are reportedly going to be released, and it looks like Kompany is more focused on improving Bayern defense at the moment. Hiroki Ito marked the first recruitment in the Kompany era, the Stuttgart defender was bought for a dowry of 30 million. I think Bayern management will give Kompany more budget to spend in this transfer window.