@Saturnchild:
You do realize how silly this statement is in a fictional universe where biology means nothing and anybody can become as strong as they want just by training right? Women are not as good in fighting in the One Piece for the SOLE reason that Oda is not comfortable with making them fight. Hence sexism
But honestly I have already semi come to terms with Oda's huge issues with women. What I find more annoying is how little effort he puts into them. Seriously at least develop them better. Rebecca was started as having an awesome speed and observational haki or something and then nothing. Robin just got flower cloning otherwhise her powers were basically the same except for slightly bigger arms(although the wings were nice). Ditto for Nami. Also she really got some some slightly better weather powers.
Meanwhile look at characters like Dofla and Law. He puts insane amount of details and comes up witht he most insane twists of their powers. Luffy got gear 2 and 3 as well. Choppers got a gazzilion forms. Honestly long time members like Nami and Robin deserve more respect and more growth.
Even if he doesn't get them real fights I really hope that in the next chapter they get some more time and we see more of their abilities being explored and they stop being neglected so much
The thing with Strawhats fights since Timeskip is that Oda is going for the story and secondary thing is fighting so story progress holds him back when it comes to showing off Strawhats abilities.
Strawhats are pretty damn strong now and as we see Yonko crew or some very strong fighters that are stronger than Doflamingo crew might be first real, big challenge for them making them fight with all they have.
One pretty cool example of how Oda builds up characters when it comes to "what they could have done in different circumstances" is how he shown Bellamy approaching Luffy from behind when Bellamy was thinking about assasination of Luffy.
As we seen lately Bellamy was capable of landing some hits on Luffy- by suprise and without it as well. Chances are that if he would be determined to kill Luffy back in Colosseum he could have done that when he had chance of attacking him with lets say knife by suprise and piercing Luffys heart.
Even kid Law was capable of almost killing Corazon by sneak attacking him, Robig being efficient assasin speaks mostly about her devil fruit being perfect for such job, not that she is great fighter.
Being assasin and being a fighter are two completely different things in One Piece.
As for talk about sexism and unequal treatment of Women when it comes to fighting- I am not interested in it at all, Oda gives different role to different people in his manga. Its very boring subject for me to talk about how it is affected by gender.
Nami being navigator with some extra skills useful skills and not being a great fighter is example of giving roles simply by what character can do with resources he/she has. Making everybody fighters or fleshing out their abilities fully too early would kill the thrill.
Can you imagine how long would it take if everybody would get kind of same amount of fighting when beside fighting there is other stuff that needs to be done?