If anything, wouldn't the red shirt mark Uhura as a brilliant technician or engineer? She is seen repairing systems at least once (in coveralls, no less) in TOS.
The brilliance is inferred from her presence on the Enterprise. YMMV.
Yeah, I see her role as that of a tech or engineer for just those reasons. She's great at operating and repairing the Communication equipment. Hoshi in Enterprise
is a linguist and wears Science blue. Nuhura is both.