A cohesive story means nothing if the story is consistently bad. The Prequels were bogged down by uninspired politics and unlikable characters. Even if one could look past that, the poor production made them even harder to take in. The consistency of Lucas's vision doesn't outweigh all the flaws of the Prequels.
While the Sequels weren't a unit, they were each very interesting films. J.J. Abrams gave viewers a really interesting cast and set them up for mysteries to be solved later. While Rian Johnson diverged from Abrams' plan, his own vision was a compelling examination of the fall of heroes and the burdens of the past. And The Rise of Skywalker was a great spectacle, unhindered by clunky dialogue or boring scenes. So while the Prequels were more consistent, the Sequels had the actual better quality.