Miss Fortune needs another mini rework
Her passive is great at delaying boots for a little bit but is irrelevant in combat. It's more or less an inverse of Kalista's passive.
Her Q is actually fine.
Her W passive damage was always very deceiving. Just base magic resist will cause the damage at max stacks to be reduced in half. That's huge. If it was physical damage the damage it does would even be lower. .
Her E does have a good slow at max rank but the radius of it is small in an era of gap closers. It's also a channeled spell.
She has a team reliant ultimate. On release her ultimate was great because it had a larger width and more range so she could be played outside of aoe comps which was the meta back then. Nowadays her ultimate is only good if you have Amummu or Galio or Kennen or other champions on your team.
Her range is too short with someone who has no escape. If Ashe can have 600 range with right clicks that slow why cant MF have 600 range ?