the reason i cited pegg and not the okudas is that pegg co-wrote the last kelvin timeline film. his, doug jung's, and justin lin's intentions - being the last people to shepherd that storyline - are most relevant.
Pegg referenced the Okudas' idea a few days after the film came out, in defense of the apparent change in Sulu's sexuality (although he was in error, because he incorrectly assumed Sulu was born before the timelines diverged). So the fact that he referenced it after the movie's release reveals nothing whatsoever about his intentions in co-writing the script. He was just using it as a convenient handwave to respond to the canon purists and homophobes complaining about gay Sulu. He'd probably recently read a draft of the Encyclopedia or had a chat with Mike Okuda or something.
The thing is, of all three Bad Robot movies, Beyond is the one that has the least need for the "retroactive time ripples" handwave, because it meshes much more smoothly with previous Trek canon than the two Abrams-directed films did. The characters feel much more like their TOS selves, the depiction of interstellar travel isn't as bizarrely instantaneous, there's no depiction of Earth or any previously established Federation species to introduce inconsistencies, and the story is trying very hard to respect and make use of ENT-era background, allowing for the slight variances in detail that are inevitable between any two different sets of creators' approaches to the same concepts. It's clear to me that Pegg, Jung, and Lin were trying harder than Abrams, Kurtzman, and Orci to keep their movie consistent with Prime Trek. So the idea that Pegg was the one seeking license to diverge more just doesn't add up. That's why I think the Okudas came up with the idea to rationalize some of the reinterpretations seen in those first two films.
i wasn't suggesting this is definitive, just the best explanation for why the kelvin timeline films' specific starships likely won't be showing up or being mentioned in star trek: discovery. it's possible they'll throw in a reference to the kelvin or the franklin, but until they do, their total absence from the prime universe productions is easily explained as absence from the prime universe itself.
There are countless things from the Prime universe that are seen in one production and totally absent from others. We never saw a Tellarite in the 24th century, or a Denobulan in the 23rd. We never saw any of the TMP background aliens outside of TMP, or the new TVH background aliens outside of TVH. "Wolf in the Fold" had sensor chairs that were infallible lie detectors and psychotricorders that could reconstruct people's memories, but neither technology exists in the 24th century. And of course, as I said, nobody ever mentioned NX-01's existence in any of the 23rd- or 24th-century series. If such absences required alternate universes to "explain" them, we'd have to treat Prime Trek as several dozen separate universes already. The explanation is simply that Trek continuity has never been as seamless as fans like to pretend it is.