The phrase "as a useful corrective" is correct and usable in written English.
It can be used when discussing something that serves to correct or improve a situation, perspective, or understanding.
Example: "The author's analysis is presented as a useful corrective to the prevailing theories in the field."
Alternatives: "as a helpful adjustment" or "as a beneficial amendment".
Horta-Osório's speech should serve as a useful corrective.
My guess is that, ten years from now, we'll see it as a useful corrective.
So extraordinary was the multifaceted Franklin that it's all too easy to sentimentalize him, and here Wood's book can serve as a useful corrective.
One of the earliest Greek epic poets, Hesiod, through his works, serves as a useful corrective to Homer's more glamorous portrayal of the world.
It's probably fair to say that Simon & Garfunkel can be a bit po-faced at times, so as a useful corrective I recommend checking out "The Most Peculiar Man", a YouTube video its creator cheerfully describes as "a crappy animation made to go along with A Most Peculiar Man by Simon and Garfunkel".
And if there was anybody suffering under the illusion that Trump might actually have learned something from the setbacks he has encountered since January 20th, or that he might have decided to embrace a less confrontational approach, Saturday's speech served as a useful corrective.
For those who see Trump's Presidency as an aberration, or as a singular phenomenon, Cotton offers a useful corrective.
Anglin, Paz and Zurek (1997) examine some less well-behaved models of decoherence and provide a useful corrective as to the limits of decoherence.
As a result, her book offers a useful corrective to the myth that youngsters are all feckless, internet-addled layabouts who need to have the joints and tequila shots snatched from their hands and be sent on national service.
After several years in which the market was often celebrated as a crystal ball, the Supreme Court ruling was a useful corrective.
For anyone who thinks of product placement as a recent innovation, Ms. Wyman's book is a useful corrective.
