User blog comment:Emile674/Rework of Ashe - The Frozen Archer/@comment-4593717-20130409182916/@comment-4022742-20130411060952

Because Sejuanni's 10% slow on auto attacks is so strong and can't be escaped. Sorry to do this to you, but the amount of carries that have a blink/dash are still greater then those that don't.

15% slow is not going to do a lot.