Issue that was not discussed or mentioned as far as I remember...

Do they want kids... does Nina want kids? Buddha might not be alive for long enough to see the kids grow up... They could have said something about this... a line or too would have been enough to resolve this...

That seems to me to be the major issue in this relationship... All the other things are comparatively trivial.

Seems like a major gap in the movie to me... other than that I like it.