User blog comment:JBox2D/Yasuo, Ashe, the League of Mobility, and everything else that I think should be done/@comment-4996845-20140207022840/@comment-24420226-20140207053834

Roots don't interrupt gap closers (with the exception of Yasuo's E). This would still allow the gap closer to go through, and infact allow the attacker to perform their follow up since it's only a root and not a stun. You would have to predict the gap-closer coming, and honestly with a 575 attack range, you probably couldn't land it before they jump to you (as JBox mentioned before Irelia's blade surge has 650 range, and Fizz's Urchin Strike is just under Ashe's range with 550). Draven's E interrupts gap closers becuase it is a knockback.

I still take my stance that, even with the prevelance of mobility in S4, Ashe still has strong enough kiting power. If it's a 1v1, the ult is enough to interrupt the enemy's combo and allow her to reset. If it's a teamfight, you can have your support help peel for you (Janna or Thresh are excellent supports to go alongside Ashe). If Ashe is caught out in a 1v3 or similar, then big mistakes were made and most carries would be boned anyways.

Although, the idea of peeling back the power on Ashe's slow is something interesting. I know the perma-slow on skarner is the reason they are giving him a big rework.