Except this comes back to same problem most things do these days: battery life. You're going to need to return these to their case every few hours, so no one is going to wear them uninterrupted for a day.
Nobody listens to music 24/7 ...
(This is a rhetorical question. You don't have to answer, because the answer is self-evident.)
Two extra months isn't going to fix that IMHO. If you are struggling to get a minimum viable product, it's worrisome.
Who knows though, maybe the problems they had were in the actual manufacturing of them.