Agreed. We have a good few one-shot characters, we don't need more just so they could be re-used again. LD could be worked in here and there as a rival for RD who got bitter or something, even if it's a bit cliché'd. Or have Gilda come back at some point. Doesn't have to be the main point of the episode, but could be a side plot. How about Flim and Flam, what happened to them?
Rose? Yeah, actually, make a whole episode about Rose!
I would love for Steven to show up in an upcoming episode. You know which one I'm talking about.>>438975
Very likely. There are a lot of aspects of the characters left unexplored and story ideas unused. I also don't think focusing that much on the side characters would be that great of an idea. But that could just be me thinking about what I want from the show. Then again, I'd be all for an episode starring the Flower Trio at least in a semi-important role, sooo…
Having re-occurrring side characters doing things here and there would be pretty fun, though, and would bring the world alive a bit better, like you said.