I was honestly fine with the MF mini rework, as a MF player myself
Until they pulled this: Impure Shots (W) active attack speed gain reverted to 20/30/40/50/60 from 50/55/60/65/70
Now, this wouldn't be an issue, if she kept GW on the attacks. Instead, Riot removed that in favor of having Strut active. I have been playing her on the PBE, and the Strut active isn't bad...but its highly situational. Usually when you activate Impure Shots, its for the attack speed and dueling. Strut is a passive that doesn't reward her for being in combat. Grevious Wounds cut attack speed. Before, I was fine with trading GW for a much more significant attack speed boost. Now...it doesn't seem to be the case.
I really like what they have done with Double Up. That was a step in the right direction. It gives a very powerful burst to enemies hiding behind low HP targets. Make it Rain is still a weak spell, but now an early 40% slow that gets its damage off easier is nice. But the main issue is Riot won't just let her keep her w power. It was fine where it was at 50/55/60/65/70. There was no reason to change it back since they removed GW from her kit.
Riot, from a Miss Fortune player, give her back either a) Grevious Wounds or b) The attack speed. Either one works just fine. I know you hate how Grievous Wounds shut down certain champs, but without those and a noticable attack speed, Strut will not fill the void losing these left.
On a side note, I like how Strut isn't broken if something rams a shield, but can we make it immune to minions past level 11?