Bayer Leverkusen have bigger shoes to wear this time around because now their focus is actively divided although last season it was also but this time around it will be the champions league of which they might not be able to Stand most of the top teams there and when you are playing and then you constantly lose games then the form and mentality of the team also deteriorate to a very big extent.
There's nothing different, they were have Europa League in the last season, so it's only change from Europa League to Champions League. The opponents are stronger, but the schedule is same. Looking at their performance, I really doubt they can able to make it to round of 16.
They aren't as strong as in the last season, similar to Napoli.
Seriously, they are also playing a number of games in this, as they played last season. If, through that, they are really in good form, I don't think any competition will seriously distract them from other competitions. However, when they decide to focus more on one competition than others, it is possible that it will distract their performance in the others. If last season the reason why Leverkusen was able to achieve two in Germany was because they saw every competition as a great match, and they did their best in every match, both in Bundesliga and Europa matches and other competitions,then Leverkusen should take every match very seriously again this season. That will really help because if they allow the Champions League to distract them, it is possible that they will end the season without any achievements. In fact, they may not even have a good record by the season's end.