J.J. Abrams didn’t outright say that he feels the Star Wars Sequel Trilogy should have been handled this way, but one would imagine that the saga these three movies chronicled might have been better received overall had that been the case.
On the other hand, perhaps The Rise of Skywalker would have fared better on the critical front had Abrams more closely coordinated with Rian Johnson to ensure that Episode IX more seamlessly built off the groundwork The Last Jedi laid, as opposed to feeling weirdly distanced from it.
Even if Lucasfilm had still been determined to use a different filmmaker for each movie, at least having a more concrete, three-part storyline structure would have helped things flow better, even if it meant each director was more restricted with the ways they could make unique changes.