The phrase "a much more problematic" is correct and usable in written English.
It can be used when comparing the level of difficulty or issues associated with something in a more intense manner.
Example: "The new policy is a much more problematic approach than the previous one."
Alternatives: "significantly more problematic" or "far more troublesome".
After the Holocaust, The Merchant of Venice is a much more problematic "comedy" than it ever was for Coleridge; as is Othello after Stephen Lawrence.
These towers also spew a much more problematic gas: The three regional coal-fired power plants — Jänschwalde, Boxberg, and Schwarze Pumpe — are among the largest point-sources of CO2 emissions in the world.
Mr. Noriega surrendered after a 10-day standoff with American forces, but he had taken refuge in the Vatican Embassy in Panama, obviously a much more problematic target than the house in Mosul.
The audience is also with Louis C. K., though less audibly so, during a much more problematic and risky segment that he helpfully labels "Of course — but maybe," as in, of course slavery is a very bad thing, but maybe there's another way to look at it.
Like Heartbleed, Shellshock is a vulnerability, but a much more problematic one because it exists in the basic command line of the Unix operating system rather than in the software used by some sites.
Timon of Athens is a much more problematic play.
A second, much more problematic set of Lukács' commitments becomes explicit in the writings between the 1930s and the 1950s.
Aristotle follows his treatment of "arguments in the figures" with a much longer, and much more problematic, discussion of what happens to these figured arguments when we add the qualifications "necessarily" and "possibly" to their premises in various ways.
"For instance, in Quebec, they know full well that rail is much more problematic a transportation method," she said, a reference to the disastrous train crash that decimated the town of Lac Megantic two years ago. .
In Spenser's poem, fire also symbolises desire, but ice doesn't stand for hatred but for an emotion that is much more problematic for the lover: indifference.
But what may have been intended as an innocuous assertion of their rights in Texas became much more problematic when a gunman opened fire on police officers, leaving law enforcement scrambling to figure out how to respond.
