"writing acumen" is a correct and usable phrase in written English.
You can use it to refer to someone's skill in writing, especially when outlining their natural ability or talent. For example, "John's writing acumen is apparent from the impressive essays he produced in school."
She clearly has good business acumen, writes all her own songs and is hot!
R. L. Arkell wrote "by her acumen and geniality, [Caroline] ensured the dynasty's rooting itself in England", and W. H. Wilkins said her "gracious and dignified personality, her lofty ideals and pure life did much to counteract the unpopularity of her husband and father-in-law, and redeem the early Georgian era from utter grossness".
He assesses not only direction, writing and acting, but camera-perceptiveness, lighting, sound, the acumen or otherwise of producers.
"Abroad: British Literary Traveling Between the Wars" (1980) examined a tradition in writing rarely examined by scholars, and it was hailed for its critical acumen, though it also includes a rant against tourists and tourism, which he decries as the antithesis of ennobling travel and the bane of real travelers.
"As our conversations began to center on the upcoming 1982 election, my father never mentioned that he had any particular confidence in my political acumen," Andrew wrote in his memoir.
Sasha Dichter, Director for Business Development at the Acumen Fund, writes a blog from the frontlines of social change, raising money and getting things done.
They have the business acumen and the passion, but they don't know how to go through setting up that business, or writing that business plan.
Writing about the later paintings in Ofili's 2010 retrospective at Tate Modern, Adrian Searle, a British critic who has followed his career with particular acumen, found them "uncompromisingly difficult".
His journey has been arduous due to entering college with severely remedial reading, writing, and math acumen.
ISIAH'S HUBRIS -- A lesson Isiah Thomas did not learn: Don't write a business/life manual if your vaunted acumen has just killed off your acquisition of the Continental Basketball Association.
