Bayer has become more stable, this is what they have lacked since the beginning of the season, and now the decisive games will be with strong opponents, like Dortmund. I think that Bayer is able to beat them now, but Dortmund is too stubborn at home, so I admit that they can lose points. For now, I do not admit that Bayern will allow Bayer to get close enough to worry, the most important thing is to not allow such games as the one with Mainz.
Bayer Leverkusen's performance is increasing, and they have become stronger. and I have started thinking that this team will be a challenge to Bayern Munich if Bayern Munich does not use their best performance to play more matches. Currently, Bayer Leverkusen and Bayern Leverkusen are only 4 points apart; that is the difference between Bayer Leverkusen and the way Bayer Leverkusen's performance looks now.
They will surely be doing everything possible to win their matches; that is why I said Bayern Munich should not try to make any wrong move that will result in losing their match because Bayer Leverkusen will get closer. What they did against Mainz will not even happen again because I believe they will take that as a mistake and not do that again.
Honestly, Bayer Leverkusen are on a winning streak currently, and they are trying to make the competition more intense as they move closer to Bayern Munich, who are at the top of the table. With the way the competition is going, Leverkusen's chances of winning are also increasing. Some weeks back, I did not see Leverkusen as a big contender for this season's Bundesliga trophy, but now I would say they are becoming a significant challenge for Bayern Munich. There is only a four-point difference between them and Bayern Munich. Bayern Munich really need to put in more effort in the remaining matches; otherwise, Leverkusen may take that position from them.