I also agree with you that Bayern has the higher chance of winning the league than Leverkusen because Bayern players are to smart, sharp and very fast in attacking and you will see how desperate they are to score goals. Leverkusen showed that they prefer to draw the match instead of losing since they saw the pressure of Bayern on them. Bayern has more quality players than Leverkusen which is a good advantage foe them to be better than Leverkusen. I don't see Bayern losing any of their matches soon.
Leverkusen want to use the strategy and technique they used last season and because it did worked for them last season and they won the league title with an unbeaten record along side, they are believing they can achieve same this season even if it's without the unbeaten record, I'm saying this because like you rightly mentioned, in the game against Munich it was obvious they were playing for a draw and it they didn't mind if they don't win, maybe they are looking at drawing with the bigger teams who may pose some threat and win the smaller teams, that way they may be able to accumulate points enough to get to the top but if they continue with the draw mentality, they are most likely not going to win the league title again, maybe they could just finish at the third or second position on the table by the end of the season.