Sven Ulreich before joining Bayern Munich had defended two great clubs VfB Stuttgart and Hamburger SV, with the experience he has of course Bayern Munich's goal will still be safe from conceding.
He did not have chance to play for Bayern because they have Neuer who played well and is their legendary goalkeeper. Neuer has good reputation in Bayern and Germany and unless he has too bad form, it is difficult to send him on bench.
Ulreich will have a very good opportunity to find a good position in Bayern with Neuer injury. If Ulreich performs well, he even can become a main goalkeeper for Bayern in a next season. Neuer soon will be impacted by ageing and will perform worse.
When Bayern Munich let Robert Lewandowski go, I believe that they didn't take into account the problems they would face in the future.
They had plan with Sadio Mane but not all plans can work as expected and they had it with Mane. Bad adaption in Bayern and got an injury, Bayern did not plan it when they bought Mane to replace Lewandowski.
At the moment, the team does not have a reliable striker. n It is clear that this was not an issue when Robert Lewandowski was in the team. However, in spite of the fact that they are playing well in the Bundesliga at the moment, I do not think that they will be able to compete well in the Champions League in the near future.
No striker at Lewandowski level in Bayern at the moment but with their good system and good midfielders, they can help a normal striker like Choupo-Moting played better. However, it is only fine in Bundesliga, in Champions League, they can not get good contribution from a normal striker like Choupo-Moting.