I love the trailer! I have really high hopes for this. I don't think it will be a Last Five Years situation because unlike that, they've got a new screenwriter credited and there's a lot more potential to open the script up from its three-person musical origins (which had already been opened up from the one-man musical before it). I've also just seen that (as well as Dear Evan Hansen) Steven Levenson was the showrunner on Fosse/Verdon, where it was also clear that the writers understood theatre people.
I'm not too worried about Andrew Garfield's singing voice, as long as it's decent. Normally I'm ready to complain about weak singers cast in movies, but... this is an intimate musical about a writer. The emotions and drama aren't dialled up much from real life. Actual impressive belting like in Raul's performance might have felt out of place.
Genuine question: does the risk of a missold musical even apply to a Netflix movie? They rely so much on real word of mouth anyway. And it's not like people will be storming from their seats because they paid money for a ticket.