Smoker and Tashigi are really interesting subjects. Every time Tashigi has crossed with the Straw Hats, some issue of her being a woman or weak comes up. After the time skip she is much more capable with Haki in tow( is that the right phrase?) but still is no where near in league with Zoro. And she shouldn't be, it would be really inconsistent if she was.
Law told her right to her face that the weak don't choose how they die and we can see how that affects her, she is helpless against Vergo and Zoro helps her against Monet. I know a lot of readers get so pissed at her portrayal but does no one stop to think that this must be building to something big? One would think, most of the weak issues would have been taken care of off panel and while she is stronger, she just isn't as strong as she would like to be. There is some major long term stuff building with her and I don't mean something simple and as straight forward as her training under Mihawk or Boguard.
Smoker was put into a really odd situation as well. We are to believe that he is to Luffy what Garp was to Roger. Vergo was the most powerful enemy on Punk Hazard, and knowing what we know now, it's only fitting Law was able/chosen by Oda to defeat him. Not to mention Smoker purposely fought in an "unintelligent" way to sneak the Law's heart away. But he did get defeated about 3 time that day. And it seems that there is no way he is in Luffy's league. I have to wonder what does Oda plan to do with him?
End of series, guys like Smoker, Tashigi, Koby, they will be the leaders of the reformed Marines but in the present its a real mystery. Very exciting too.