Leverkusen are really pretty impressive so far. Xabi Alonso is just continuing from where he left. I'm curious about one thing as well. Can they stay in the title race until the end? After seeing them performing really decently in Allianz Arena and stealing a point from them too I started to think about this possibility more.
Leverkusen wouldn't do like Dortmund did at the end in my opinion. They would play much stronger if they play a championship game on the final week of the season. Therefore Bayern Munich had better be as consistent as possible if they don't want to see their title streak ending.
There are still 30 matches left that will answer that Bayern Munich can easily reverse the situation in the standings. It won't be too surprising for a few moments to leave Leverkusen occupy the top of the standings, they have done their best but this is arguably consistent? When Bayern Munich and Dortmund are accustomed to fighting for their first places. Last season Leverkusen was able to play with Bayern Munich and if you see the record of Bayern Munich won more than 43 times while Leverkusen was only able to win about 19 times significant differences.