The phrase "additional importance" is correct and usable in written English.
It can be used when emphasizing the significance or value of something beyond what has already been mentioned.
Example: "The findings of this study hold additional importance in the context of climate change."
Alternatives: "extra significance" or "further relevance".
Of additional importance, an impact factor above 2 is important in some countries, where the productivity of researchers is rated annually from their publications in journals with an IF above that level.
But other tasks such as editing and design take on additional importance.
But now that early selection has become the pattern, the choice seems to have gained additional importance.
Furthermore, because the salesperson's role can be especially frustrating, the first-line sales supervisor's role has additional importance.
It gains additional importance by the new HCV drugs which improve the therapeutic possibilities dramatically.
Yet in this case, extra-column dispersion gains additional importance due to reduced peak volumes.
The Tories, not Labour, will now be the principal party of opposition, a role given additional importance because the SNP just fell short of securing a majority.
It has the additional importance that it makes possible the extended use of modern streamlined 'lightning' trains in consequence of the longer journeys now undertaken.
Instead they are reconstructing their identity, a process that gives additional importance to the community, to campaigns to restore the use of Arabic, and of course to religion.
And knowing the extent of the impact "has additional importance for families because it provides emotional closure, qualifies them for disaster-related aid and promotes resiliency," they said.
Perceived cognitive deficits were associated with depression, anxiety, and posttraumatic stress disorder, illustrating the additional importance of adequate assessment and treatment of psychiatric symptoms.
