The phrase "arguably minor" is correct and usable in written English.
It can be used when discussing something that can be considered minor or insignificant, but there is room for debate about its importance.
Example: "The changes made to the project were arguably minor, yet they had a significant impact on the overall outcome."
Alternatives: "possibly trivial" or "potentially insignificant".
In the scheme of things the inconveniences and disappointment she endured were arguably minor.
However, Dastar has instead taken a creative work in the public domain, copied it, made modifications (arguably minor), and produced its very own series of videotapes.
Dastar's alleged wrongdoing, however, is vastly different: It took a creative work in the public domain —the Crusade television series copied it, made modifications (arguably minor), and produced its very own series of videotapes.
Some of the mistakes were technical or arguably minor, and it is difficult to determine with certainty if they played a vital part in the court's reasoning and final judgments.
Wagner's approach has two (arguably minor) statistical problems.
Despite some differences, the deviation from human trauma patients is arguably minor when analyzing the amount of air in each anatomical location.
But in comparison with possible technological risks, these natural risks are comparatively well studied and, arguably, comparatively minor (the major source of uncertainty being on the technological side).
The update, arguably a minor tweak in the grand scheme of things, is aimed at helping Twitter continue its transition from the text-based service it has been in the past to one that better supports rich media.
While arguably a minor feature update – Google didn't even bother putting out an official announcement about the iOS changes – it's the sort of thing that helps Google Maps better compete with its rival Apple Maps on iOS devices, where it doesn't have the benefit of being as deeply integrated into the mobile operating system.
Beyond his classics — "One Day in the Life of Ivan Denisovich" and the three volumes of "Gulag" — there are books in Solzhenitsyn's oeuvre that are arguably dull or minor but never tangential.
The work at hand for this finale is the Mass in B minor, arguably (that is, for those of us who don't like the Passions that much) the greatest of Bach's sacred works.
