I don't think that anything is lacking in his films. As Crumbsroom said, the complexity is within the characters.
I think that to look at an Ozu film and think "He's framed this shot meticulously because the story isn't interesting enough" is a fundamental misreading of what he is trying to do (and succeeding, in my opinion) with the stories he's telling and how he is telling them.
This is going to sound pejorative, and it's really not meant to be, but I think that if you can't invest in stories about people who are simply handling the daily ups and downs of life, you might reflect on that as an area of growth for you as a viewer as opposed to a flaw in those stories. Or, for a less aggressive sounding variation: it is possible that you are uninterested in "little moment" dramas and Ozu is great at telling those stories, and thus you might just be fundamentally mismatched as artist and viewer.
I think that to look at an Ozu film and think "He's framed this shot meticulously because the story isn't interesting enough" is a fundamental misreading of what he is trying to do (and succeeding, in my opinion) with the stories he's telling and how he is telling them.
This is going to sound pejorative, and it's really not meant to be, but I think that if you can't invest in stories about people who are simply handling the daily ups and downs of life, you might reflect on that as an area of growth for you as a viewer as opposed to a flaw in those stories. Or, for a less aggressive sounding variation: it is possible that you are uninterested in "little moment" dramas and Ozu is great at telling those stories, and thus you might just be fundamentally mismatched as artist and viewer.
There were plenty of little moments as you say in Once Upon a Time in the West, as much of the movie was facial. I just don't think the story of Late Spring is as "complete." And again, it's too familiar and typical of a story in the long run. It's well-made for its story, but it's still a simple one. Like how Dua Lipa makes really catchy songs, but they're still layered and structured like typical pop songs that have been done before for the last 20 years.