Jinx is 100% in need of a nerf. I've been running double hextech (Usually being jinx and vi or camille and jinx) and jinx once she hits tier 2 or gets 2-3 items on her always does the most damage. Constantly doing over 6k damage and being the sole reason I win games. Just played one where I was in last place and came all the way back up to first and won simply because she hit tier 2 and I stacked two cursed blades on her and a shiv and she absolutely murdered everything. No amount of units/positioning or anything could stop her unless she got picked off by a blitz which ofc is easy to prevent by just tossing a unit far away from him.
Idk how you plan to nerf her but she's def an issue