This has been happening ever since impel down and marineford and continues to happen even now, there are some reasons I actually prefer pre-ts OP compared to the post-ts, marineford arc was more of a cause to some weird/bad trends in OP that happen these days, but I dont actually mind the jumping around since I've been able to get over it, the fact the the writer cant even focus one whole chapter to an scene alone is weird as hell and this didnt happen before TS, while u can be used to it, but it can be annoying sometimes, the more I'm worried about is Oda doing more sub-plots than he can handle, the main problem I've been having about the post-ts is the fact that Oda stuffs so much in one arc that I lose track of what is happening time to time, it becomes annoying and the whole arc seems like a cluster fuk making the writer jump from a scene to a scene like a headless chicken, I mean since the ts we barely had any interaction between straw hats and the attention given by the writer to straw hats is reduced massively while the writer tend to focus too much on useless side characters, and not to forget that during dressrosa Oda loved to waste panels with people running from bird cage and Viola & Riku saying the same annoying things almost all the time, all those cries and suffering of the dressrosa people for me arent even that sad anymore, it lost the element of surprise for me.
