I think Prime's initial premise of being Superboy in a "real" world had promise, like in Kurt Busiek's Superman: Secret Identity series.why would you need yet another Superman or Superboy to do that story tho? There are 5+ super-characters of the top of my head (including the original one) that story could be told with. that's the thing, "restoring" or "redeeming" Prime is not a sustainable idea because it's redundant given the evolution of the character and is just circular storytelling. what's his angle when you take away his role as an antagonist? he's the even more powerful but still super good Superman that may or may not have been a decent kid but spent years and years living in pettiness and killing intent, so he's grittier i guess? What Superboy-Prime represents (the toxic fan) would be undercut trying to play into that angle because you shouldn't be empathizing with him anymore in the first place. he had a chance to do good and because of his entitlement complex and because he felt slighted, he continuously chose to hurt others and do wrong. he represents the extremity of why we shouldn't act or think like that, and because he represents that extremity, pretending that kind of behavior on that scale can be washed away because he's "cool" and powerful but "like super good now" and so we can root for him now undercuts the point of that character. in order to not be constantly undercutting the point of what he was back then, you'd have to just make no references to his villainous streak in order to sell that character, and which point he's just Superboy #4 or Superman #5. whatever idea that could possibly be done with that kind of character would be better suited to one of the other 4+ Superman characters or the dozens of Superman-adjacent characters. When you have a character that interchangeable, you get in a situation where you have to look for an edge to keep readers interested and to distinguish the character. so (if you're a competent storyteller) you dig into what the character's done and see how you can play with that and, given his history, you'd likely end up with a handful of mediocre stories where he's a shell of a Superman before they inevitably set him back to being petty and spiteful like he was in his most recognizable appearances; right back where we started, circular storytelling.