Side-note: There's some kind of thematic buildup going on (gaining strength) recently. Davesprite made me think of it, because way back when his identity crisis was the point, how he's not the "real" Dave anymore.
Fast Forward to Dirk's Heart powers, part of which involved him (at least seeming to) have conscious awareness or control of his alternate incarnations, like his dreamself and brain ghost!Dirk. When Dave and Dirk finally started hashing out their shit, Dirk's commentary to Dave pretty much stated that there IS no "real" Dave, with all the different versions being important and relevant somehow.
Now, Davepetasprite seems to have a direct awareness of all the other Daves (and presumably Nepetas), along with Jasprosesprite. So... the sprites are something like Dirk's power, and all of them imply that no one is irrelevant.
I'm thinking it's an allegory for getting bogged down in life choices and regrets, where one choice a person made doesn't turn out like they'd hoped and regret ensues. The message is don't fret over past mistakes, use them to learn and move on.
For the story... I'm kinda leaning towards the theory that the trolls, kids, and cherubs are all inside some kind of mega-session tailored specifically to each one of them. I wouldn't bet money on it though. Beyond that I don't know what to say, but I wanted to point it out.