User blog comment:ZeloAvarosa/Riven Rework/@comment-5663427-20141128073511/@comment-1330314-20141128140417

"Zero balancing" usually means the numbers on an ability are massively OP or underpowered, but a lack of weaknesses is a major design flaw, not just a matter of balance. If you had buffed Riven's health regen, for example, that would not have been very good balancing, but here you gave her an entire resource system that provides her with sustain, which is meant to be one of her biggest weaknesses in lane.