The phrase "a much more central" is correct and usable in written English.
It can be used when comparing the importance or relevance of something in relation to another, emphasizing a greater degree of centrality.
Example: "In this discussion, we need to focus on a much more central issue that affects our community."
Alternatives: "a significantly more central" or "a far more central".
This latest report gives behavioural change a much more central role than in 2007.
Government prosecutors said he had a much more central role, however, that included delegating the tasks to specific employees and checking often on details.
8.17pm BST Emmott: "I would love to think business will play a much more central role than it is in moving debate forward".
"For Democrats, health care is a much more central issue," said David L. Friedman, an Obama fund-raiser who created a chain of nursing homes in Maine.
"It has a much more central role in this decade under the Obama plan than it did under the Bush plan," said John M. Logsdon, former director of the Space Policy Institute at George Washington University.
In the 19th century Rome assumed a much more central role in missionary work, defining missionary territories and assigning responsibility for them to various religious orders, and individual popes personally supported the missionaries and directed their evangelical efforts.
The maps also clearly illustrate that a number of official websites are much more central when only in-links are taken into account than when both in- and out-links are counted, showing that whereas they are linked to, they themselves do not have large link lists.
The move by Amazon "is a big deal and it's a big step forward in public libraries being much more central in the whole e-book growth," said Steve Potash, the chief executive of OverDrive, a large provider of e-books to public libraries and schools.
Clamping down on immigration, embracing economic protectionism, rebuilding infrastructure, and blowing a raspberry at the Washington establishment were much more central to his platform.
For Mitt Romney, too much time spent attacking Mr Obama for being weak on defence means less time spent hammering home his much more central message that he would be a far more competent manager of the economy.
They find a very heterogeneous contact structure where some health-care workers are much more central in the contact network than others.
