Right now Bayern is on the brink of a new era, some of the older players will eventually leave we all know that, they won 10 titles and all but they need to revamp the whole squad aside from players that are younger. You can't do that all in a single season, but each season one older player will leave and another will replace. Tuchel is the best manager to do that seamlessly, he will be able to bring the team so much success, probably in UCL as well.
Exactly, I agree. Bayern Munich decided to make their manager change very late in the season. They were in a critical time period as well because they were competing in the Champions League and they were in a tough challenge with Dortmund for the Bundesliga title at the same time. I think that it was a really wrong time for them to change their manager because it was a big risk to take as the new manager would need to take his time to adapt to the team even if he was Tuchel.
Because of that it would be unfair to judge Tuchel hard for being eliminated from the Champions League and not being able to pull away from Dortmund in the Bundesliga as well. I also expect a totally different team next season. They would start with signing a top striker this summer which would help them make a big progress. After that they would have a really solid season with Tuchel's strong strategies.