The phrase "a much less influential" is correct and usable in written English.
It can be used when comparing the influence of two or more subjects, indicating that one has significantly less influence than the other.
Example: "While the first study had a profound impact on the field, the second study was a much less influential contribution."
Alternatives: "far less impactful" or "significantly less powerful".
So far, the SNP's public scenario planning has centred around a Labour government taking power at Westminster: a Tory victory would allow them to present themselves as a vigorous champion of Scottish interests but could leave them much less influential, with Labour still occupying the more dominant role as the official opposition.
"We are much less influential, powerful and I would argue we are a much less safe country under the last four years of this president".
They are joined by five representatives of the national game who are much less influential.
"Asia-firsters," including the much less influential West Coast establishment, most Republicans, and the navy, rued the equanimity with which the administration witnessed the collapse of the Nationalists.
Despite his ascent in Iowa, he faces daunting obstacles as he moves on to New Hampshire, where Christian conservatives are much less influential.
In this model the prime minister is much less influential, especially when governments are short-lived or when they suffer from deep internal division (as was often the case in Italy until the 1990s).
Polling experts and social scientists note that conservative religious views are much less influential here than in the United States, with regular church attendance far lower and with fundamentalist Protestant groups attracting far less support.
Members of the nine-strong panel, which included the BBC's business editor, Jeff Randall, and advertising veteran Jeremy Bullmore, said Mr Murdoch was "much less influential than he was 18 months ago".
But probably for the first time in the last 10 years, Rupert Murdoch's position as the individual with the most power over the UK media was challenged: some round the table questioned how long he could remain there and felt he was "much less influential than he was 18 months ago".
