Actually, the point about Nog ending up being the lynchpin of the Federation or whatever, in a show about Nog, was a good point. I, too, was making the distinction between authority and influence, and even said so. (ETA:
That is to say, my word choice was deliberately made in accordance with that distinction.)
Measures like ratios of line count, word count, or screen time might be means of determining objectively who the focus of the shows in question was. It would be interesting to track those figures for different characters in the Treks, TWW, M*A*S*H, St. Elsewhere, etc., over their runs, but that's just beyond what I can devote to that otherwise interesting little project. As it is, we just have our respect disparate impressions.