So with the ending there are a few things that potentially make it tricky:
1. The both succeed. It might be too optimistic that these two people actually do achieve their stated dream.
2. Having seen them succeed at the cost of being together, the little alternative reality flash during his performance at the club felt heavy-handed, presenting, seemingly, an alternative world where they both succeed AND are together. Maybe that was an actual option, but it would seem to fit better if it was a happy together, having settled for not meeting their goals.