User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-2602:306:CD9A:C860:C1FD:DC65:EA11:D29C-20180506014209/@comment-2602:306:CD9A:C860:51A5:4912:662A:F41B-20180506094045

The problem is Issei is still inexperience when it comes to being a leader and as a resukt he depends on Ravel too much which in turn the team depends on Ravel. Ravel has been given too much power which can viewed as a weakness. If Issei's not careful than Rias could exploit that weakness when she face him.