It was probably the best Riverdale Musical episode to date, as they actually somehow managed to fit the songs into the actual plot of the show instead of randomly breaking into lavish musical numbers that had nothing to do with the plot. Was it cringe inducing at times? Yes, but that's Riverdale. I have read some complaints that some of the songs were too on the nose, but that's what you get when you use songs from a sung through musical.
I should note I do not regularly watch Riverdale, but just from a sheer "how do we make this work perspective", it worked.
It actually very much fit the plot of Betty's mother having a nervous breakdown after loosing her older daughter and finds solace in playing N2N over and over on their record player remembering the trip they took to NYC to see it, until she starts adopting the same coping mechanisms as Diana.
It did make we wonder if a gender swapped N2N with Diana and Dan could work? I would be interesting to see a production where they alternate the performances nightly, like the Little Foxes Revival with Laura Linney and Cinthia Nixon.
This does give me hope that despite being so innately theatrical N2N could actually work in a screen adaptation. I know Rob Reiner has been working on it for years, and has said its just figuring out how to frame a film that literally pops in and out of 2 characters minds, (Diana and Natalie). Then again there's how do you film Gabe and give the audience hints without truly revealing his truth until at least a third of the way into the movie. Then on top of that actually making it possible for viewers to point out that Dan actually is able to see him on a re-watch. Riverdale's episode clearly showed its capable of working in Diana's fantasies and blending the line between her reality and actual reality through Betty's interactions with her, but how do you make that work for a 2+ hour film.
Then there's the criticism that the main thesis of N2N is too problematic for today's audiences? Is the treatment for mental illness sometimes worse than the symptoms? The musical has the nuance the treatments being forced upon Diana by Dan, whose intentions are not get help Diana get better so much as he simply want his old life back. Then he also convinces Natalie to gaslight her mother about Gabe, which only causes Diana to spiral further. The question is how to you actually make sure that comes across in a film adaptation, especially in light of how badly the film adaptation of Dear Evan Hansen failed to even show the slightest concept of nuance.