We didn't see a big rotation from Leverkusen in their DFB Pokal game against Paderborn yesterday. The strongest rotation was in the defense line as the goalkeeper and defenders were all different than their previous league game. The rest of the lineup was pretty much the same. They got a decent win and moved on there.
Stuttgart played a much more difficult game against Dortmund on paper. However I was still expecting them to eliminate Dortmund and they really did it.

Stuttgart are in a better condition than Dortmund now and I expect them to be very ambitious in the DFB Pokal cup as well.
Xabi Alonso values every competition his team are contesting in this season and that's why he didn't make much changes to the regular Bayer Leverkusen first team we've seen all season and was rewarded with a convincing win against Pederborn in the German DFB-Pokal yesterday. Bayer Leverkusen are one of the best German teams at the moment and reaching the final of the German cup this season wouldn't be a bad idea hence the strong squad that played in that game yesterday.
Stuttgart who faced a top Bundesliga club like Borussia Dortmund were able to win in their game yesterday and progress to the next round of the competition. Dortmund hasn't been as good as they were at the beginning of the season in the domestic games and must as a matter urgency improve their performance in other to finish the season in the top four of the German Bundesliga standings.