Exactly, the chances are very good and look make sure. Since being knocked out from the UCL, Leverkusen managed to get 3 points against Stuttgart. While usually, Stuttgart always managed to draw when playing against Leverkusen.
On the one hand, other evidence occurred when Bayern Munich managed to qualify for the UCL semi finals, when facing Union Berlin they were only able to share points and that looked very bad. So I agree that Leverkusen hopes of returning to last season can still be realized this season as long as they consistently get full points and wait for Munich to make a mistake with a loss or draw in the remaining matches.
Yes, even though the match went quite tight, Leverkusen got more benefits from the victory and finally got the best with a 3-point victory. This further reduces the gap between Leverkusen which was previously impossible, to possible even though it will be very difficult to reach Bayern Munich's position. So, in this case, Bayern Munich must be aware of the various possibilities that exist, and they must be much more serious for future performance results.
Anyway, Xabi has also decided to stay longer in Leverkusen and extend his contract for the next season. So, Leverkusen will still be quite safe with Xabi, however, they do have to get the best players again so that their attack line, especially, can be much stronger next season.