And still tightly controlled. The point is: Oda can no longer devote an arc to just having an adventure (Skypeia) or to focus on Straw Hats (Water 7). He has to incorporate all the big players or the big plot threads into it.
Hence he has greater predictive accuracy. Before, he could diverge to a fun adventure arc that has very little payoff for the larger story. That is no longer the case.
Again though, it still took him 400 chapters to get that point with 2 Yonko and "focused" arcs. And the 2 comments you say are "coherent" (not sure why that word was used? His statements are all coherent, they are just never true) are just 2 of many comments he's made over the years about progress. He has made statements in the past where he says he's "halfway" and then mentions "50%", and both were made around Skypeia.
Him doing it here isn't new, and thats the point I'm making. Be my guest and trust him in thinking this will all finish in 3 years and 11 months since his "80% comment" (people loved converting that into exactly 5 years left) or 4 years and 3 months since his "5 years left" comment when Wano easily has another year or 2 left out of that chunk of time.
Knowing his past history for 15 years and how he generally writes, I don't believe what he says at all. Unless you specifically believe Oda will massively change the way he writes after Wano, alter the pacing of his story, or just plain rush, finishing in that timeframe not possible in my opinion.
Edit: Like he's made the comment already last year and nothing about Wano's pacing has changed. In fact, most people expect the arc to take over another year to conclude.