I find that MF's Love Tap is unhealthy for several reasons and should be changed
For starters, it means she needs to be treated as a burst ADC which her kit doesn't accurately support. It also means that she abuses Lethality and its items, which were never intended for marksmen in the first place. MF has become notorious for one-shotting enemies simply for landing a Q bounce without the crit due to duskblade's passive damage. Lastly, it becomes unhealthy design as it gates her ability to deal continuous damage over time with her autos, becoming preferable to go for huge damage single autos that ultimately can't be effectively stopped.
So, all that said, I suggest she gets a reworked version of Impure Shots for her passive. I realize that Love Tap procs are tied to some of her balance regarding W, and I will take that into account with the full explanation.
Impure Shots: Miss Fortune's abilities and auto attacks deal additional magic damage (scaling with AP), dealing additional damage per stack and stacking up to 5 times. Critical Strikes apply 3 stacks and double the damage dealt.
Strut: On Hit: The cooldown for this skill is reduced based on the number of Impure Shots stacks on a target. (0.2 seconds for 1 stack, 1 second for 5 stacks)
What these changes do is not only give her more reason to build critical, but it opens up her build paths while killing a big chunk of her reliance on lethality. Additionally, it gives her added reason to simply focus a target with her autos, like most marksmen are intended to do.
The numbers are more for show but hopefully this concept feels solid.
and strengthened her team fight niche.
?
or
and skip lethality entirely, which I feel eventually gives me a later game advantage, but still, I wouldn't mind a removal of lethality or ranged champions, or perhaps a limit of one lethality item at most.