MF is still pretty bad/extremely mediocre
The buffs were quite nice but she needs way more than some more AS after losing 1/3 of the damage from E + damage from passive.
I mean seriously you could argue that winrates are not everything (they are not), but let's go with order:
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http://www.probuilds.net/champions/details/MissFortune still no one playing her except 1 person that did 2 games and a brazillian guy (no offense to brazilians, but Brazil is not exactly the strongest region);
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no challenger mains;
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http://champion.gg/statistics/#?roleSort=ADC&sortBy=general.winPercent&order=descend 50.07% is not a tragedy, if you only consider the 4% pickrate and the fact that the guy below her has 34.97% pickrate while still having just a 0.4% winrate difference. (as you can see, experience on the champ does not pay off either) ;
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diamond winrate, honestly speaking, fucking sucks, and it's been the case since patch 6.1 http://www.leagueofgraphs.com/champions/stats/adc/diamond/by-champion-name , all of this while her pickrate stays pityful;
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plat winrate is mediocre if anything http://www.leagueofgraphs.com/champions/stats/adc/platinum/by-champion-name ;
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gold-silver-bronze are from mediocre to good (51.8% in bronze).
Problem is, it is fine for a champ to be good (and it's not like 51,8% is huge either), in bronze, and in bronze only?
Every single statistic, high elo opinion, pro player research shows that the champ is severly underperforming even after the W buffs.