If Bayern fails to defend the title, of course Tuchel will be the person most to blame, but we must also realize that the competition for the Bundesliga title this season is much fiercer than the previous season because the Leverkusen team currently has strength comparable to Bayern.
I think the rumors about Jurgen Klopp are groundless because Jurgen Klopp has said that he wants to rest first, of course next season he will not manage the team.
I watched a little of his interview and one of the reasons why this is his last season at Liverpool is because he is running low of energy, so he will really need time to rest and I think not only being a coach in the Bundesliga but in Laliga is very possible or it could be that he will be like Zidane who is very selective in choosing a club.
It seems that Bayern in Tuchel's hands is also very strong and even stronger than in the previous season, but they are inconsistent and fierce competition from other top Bundesliga teams is making it quite difficult for Tuchel this season.
Thomas Tuchel is a good coach but it is not that special or it could be because this is only his second season with Bayern Munich so everything still has to be built even though it shouldn't be a problem because Bayern Munich is the strongest team in the Bundesliga so any coach can always bring this team to become Bundesliga champions, especially in this decade.