She didn´t need a nerf, because she suffers from the same thing Kog, Yi, Xin, Jax and previously Irelia do.
Guinsoo's Rageblade. Before, it was a very underused, barely built item. It should have stayed that way. Ohmwrecker needed a look over and possibly a complete rework more than Guinsoo's ever did. Now, if you´re AA reliant and don´t get a Guinsoo's, you´re doing stuff wrong.
She was far from broken too. Strong, yes, sure, but not broken. Then again, which toplaner nowadays can splitpush as well as she can? Which can shred resistances as fast as she can?
Kayle did her job very well. Removing armor shred from her passive will be a low blow and affect her everywhere, not just top lane. It´s the only thing that allowed her to be able to deal with tanks, that now, oddly include ADCs as one of its sub-classes.
She's a rare sight in the jungle. Whoever does pick her and goes there has balls the size of Jupiter to do so. Or is just downright stupid.