This would solve a lot of problems.
Don't get me wrong: my chief issue with DISCO isn't the "visual reboot" (not to mention the simultaneous "aural reboot," which nobody seems to be talking about). My chief issue with DISCO is its storytelling, which is aimless, childish, and boring.
But getting rid of the visual reboot and explaining it away would certainly improve things. Their new design isn't just disrespectful of what came before (which is a forgivable sin); it's really ugly. Overcrowded, garish, and fixated on a narrow color palette centered around gunmetal gray, Discovery has the worst visual design of any series to date, while its audio "design" appears to consist of downloading sound clips from TrekCore and dumping them in the soundtrack entirely at random. (Even Voyager's grim, sterile bridge was both a visual and auditory improvement on this.) Chucking all that out the window and retconning it into a parallel timeline would remove a major, constant distraction for me. Restoring the clean lines, warm & cozy sets, and heavy saturation of the Original Series (where they often have more color in a single corridor shot than Discovery has on the entire ship) would be an added bonus, even allowing for more modest visual updates to the original '60s design. That wouldn't actually save the stories, but it would make it far easier for me to keep my patience with them.
So, yes, I would be happy if this were how the season ended. But it would probably alienate the people who actually like Discovery, without turning people like me into real fans, so it might not be the best path for the writers to take if they want to maximize their audience.