Will Luffy do আরো training with his Haki?

With what I have seen up to currently, I don't think Luffy needs to worry about it at the moment, besides, he's supposed to good at both Kenbunshoku and Busoshoku. His Haoshoku has also gotten better, as আপনি could see in some of the later fights, too.

Luffy already has really good observation Haki, so I don't really know what you're talking about. He trained for two years mastering his Haki and he's really good at it (even though for most people it takes training for ten years). And of course his HAki, along with the rest of his abilities are going to continue to improve. They're going to have to because as he is now, he doesn't have enough power to defeat a Yonkou, so he'll really have to up the anti before he goes out to face them, অথবা he's going to be crushed just like the Kid alliance.