User blog comment:Care Level/RE: PBE Riven Nerf/@comment-6000413-20131219095929/@comment-9593635-20131219120507

The shield duration impacts top-lane trades as such:

Your shield stops all damage for 1.5 seconds, like before, but then you take an extra auto, ignite tick, pulse of Sunfire, Burnout, Judgment, Flamespitter, Transfusion, and/or Burning Rage that you didn't, before.

That's pretty enormous. I'm going to call it right now: Riven will be completely unable to lane against her previously hard matchups. When perfectly-played, Riven didn't outdamage Darius by a large margin and that lane was hard; now in elect her to lose every trade with a competent Darius. Or Garen. Or Renekton. Or Jax. Or Vlad. Or Olaf. Or Rumble. Or any Shyvana that can press W.

TL;DR: she's no longer a lane bully because she's not actually stronger than anything in the lane.