>>90050166I feel like there's an optimum middle ground between too little and too much minor character involvement. The key being an intended use for the minor character's presence, however much time they actually receive in the episode. Star vs. has done well in the latter when the minor character acts as an episode's focus in tandem with the main cast, Star and Janna's adventures being an example of that.
On the other hand it's been incredibly poor at providing little snippets with those characters, a line or two just to provide the viewer with something else in the episode to make the world seem fleshed out a bit.
It's an annoyance with Jackie in particular given how much time the whole Marco crush subplot has been given, it seems faulty to not provide even a little development to a major element of that plot line, again nothing major like an entire episodes focus, but enough to garner some characteristics so the eventual payoff with the plot line has more impact.
It gets weirder that the show does this given the initial intent for the series in the original Star vs. comics that Daron made. Had that interpretation come to pass the show would have likely had to develop minor characters frequently and with little time, given the focus was on this girl wrapped up in her own imagination meeting the interesting people in this boring world she actually inhabits. Actual episodes in the cartoon that tried to do this are viewed as some of the weakest in the show, Fetch and Star vs. Echo Creek coming to mind.