I have made no secret that I would have changed Smoker and Tashigi's story in Punk Hazard, making them more badass and competentw especially Tashigi with her not losing that easily to Law and defeating Monet on her own. Tashigi should also have had flying slashes, better haki and more Rokushiki techniques such as Geppo or Kami-e.
I would also have made Smoker and Tashigi come to Wano, with the story being very different than the gigantic mess we got of an arc, with Tashigi here learning more about swords smithing and history and becoming even stronger, learning how to use either fire cutting or ice slashes, and getting in boost in haki both for observation and barrier haki while Smoker would similarly have his own power-up here. Tashigi and Zoro would also met and talked more with Zoro finally telling her about Kuina and his backstory, and encouraging her in his own way.
Both would have been allies again with the Straw Hats against the Beast Pirates and their allies (with the BMP being absent of the arc), and learning about the WG's dirty dealings with Kaido and Orochi here.
I would also have made Smoker and Tashigi come to Wano, with the story being very different than the gigantic mess we got of an arc, with Tashigi here learning more about swords smithing and history and becoming even stronger, learning how to use either fire cutting or ice slashes, and getting in boost in haki both for observation and barrier haki while Smoker would similarly have his own power-up here. Tashigi and Zoro would also met and talked more with Zoro finally telling her about Kuina and his backstory, and encouraging her in his own way.
Both would have been allies again with the Straw Hats against the Beast Pirates and their allies (with the BMP being absent of the arc), and learning about the WG's dirty dealings with Kaido and Orochi here.
