The phrase "more than content" is correct and can be used in written English. You could use this phrase when you want to describe how happy or satisfied you are with something. For example, "I'm more than content with the results of my work."
They are more than content.
But people value connections more than content.
For some communications, metadata matters more than content.
Most of us are more than content to make it back home every evening.
Alas, she had not, but we were more than content with the palacinka.
Some education theorists, though, say it takes more than content to be a good teacher.
You sense she is more than content with this state of affairs.
More than Content: The Persistent Cross-Subject Effects of English Language Arts Teachers Instructionn.
It was presentation more than content at Frieze Masters that got people talking.
Mr. Wells, a sociable and cheerful host, is more than content to be living alone.
But we seem more than content to let that brand of greatness pass us by.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com