The phrase "more due to" is correct and usable in written English.
It is used in order to show the cause of something. For example: "The failure of the project was more due to poor planning than anything else."
"I think it's more due to anxiety than anything else.
"We may now buy more due to Brexit uncertainty".
I lose some more due to water clarity/cleanliness issues.
This is happening more due to increasing demand and decreasing slack in the system.
Murray nets again - this time more due to Raonic's deep return.
First, it causes already uncontrolled health care costs to rise even more due to increased, unwarranted doctor's fees.
To date, deals have been completed for 18 houses with 2 more due to be finished by spring.
"Flights have been spaced out a little more due to reduced visibility, causing some additional holding times," Mr. Awalt said.
Currently there are five spacious, en suite cabanas, with five more due to be ready in September.
We were not able to commit to full-day cricket any more due to work and social reasons.
A few hiccups, but I think those are more due to his good play".
