I doubt he is rushing Wano, he is just pacing it really well is all, for as big as the arc actually is.
However, we also have to remember the sheer number of characters revealed, and unrevealed, that have implications on the plot. I dont see Oda truly rushing a story he has worked on for 22 years. It will nearly 30 years by the time tue story arrives at its climax, he may as well do everything concisely.
However, we have to consider Oda's likely pacing problems come towards the end of the arc. Dressrosa and WCI suffered from this, and were 15-20 chapters too long each. Wano, being much larger, will likely overextend for the sake of answering most details about the arc, similarly to past arcs