'more positive impact' is a correct and usable phrase in written English.
You can use it to describe the effect of something, usually something that is beneficial. For example: "The new policy is having a more positive impact on the local economy."
The band had a much larger, more positive impact on the world at large than any Billboard chart position or album sales or concert attendance figure could possibly measure".
The responsibility to protect has had a more positive impact elsewhere.
EE2 addition showed more positive impact on the electrogenic activity compared to E3 supplementation.
Mickey D. Levy, the chief economist of Bank of America, predicted a more positive impact from the tax reductions.
However, we do find that programmable output control has a more positive impact on effectiveness in Anglo-Saxon cultures, while delegated output control has a more positive impact on effectiveness in Northern Europe.
The event had a more positive impact on younger adults' behaviour than those aged over 44, it added.
He added, "There is no organization in this country that has had a more positive impact in promoting the culinary arts".
Always remember: the more Iraq is seen as succeeding on its own, without U.S. scaffolding, the more positive impact it will have on the neighborhood.
Though she started her career in the banking industry, McElhaney — wanting to have a more positive impact on the business world — switched to academia.
Internalizing and practicing these skills will not only help you accelerate your business, but also help you make a more positive impact in your personal life.
At that point Moeen had made a more positive impact as a batsman, notably with the memorable last-day century at Headingley that so narrowly failed to avert a series defeat against Sri Lanka.
