I can actually sympathize with you. Currently Miss Fortune's base Attack Damage at level 18 is 63, by far the lowest with Mordekaiser's at 146. Most supports in the game have higher base Attack Damage like Morgana, Nami, or Sona for example. Meaning Miss Fortune's auto attacks without her passive are REALLY weak.
During the rework Miss Fortune's base Attack Damage at level 1 was reduced by 3, which of course isn't a big deal. However her scaling base AD was nerfed to 1 instead of 3. This on top of all other Marksmen receiving base Attack Damage buffs hit Miss Fortune's dueling potential extremely hard. Previously Miss Fortune's base Attack Damage was fairly good and her W passive pretty much guaranteed she out-traded you especially taking in consideration her Q + W active, she would always win. Now it's a bit difference; she has to rely on bursting you down or she doesn't duel you at all and literally ADC Janna will hurt more with her autos simply because Miss Fortune's base AD is so low.
Miss Fortune's kit went from a really flexible and versatile ADC who owned solo queue (especially after they buffed her ultimate) to more of a teamfighting/lane bully. This is great in a lot of cases because she's easily the best teamfighting ADC and she bullies harder than Caitlyn, Corki, Lucian, etc. However she lost most of her flexibility with things like her Mixed Damage removed, her dueling becoming one of the weakest of all ADCs, and she also use to be the most tanky ADC just considering base stats.