I think the character interactions is definitely important, but I think the universe the characters inhabit can be equally memorable and significant.
The unironically space cops are the Science Police though. The Legion are literal Superheroes.Then unironically being teen space cops would make you wonder why you don't just watch a GL show (which they already have in the works)
I feel like we have seen that before .You're equating "high" sights with high concept, and that's not really true or fair. High sights, especially in now that the superhero market is so saturated with content, is mixing genre and making these things a "_____show or movie that happens to be about superheroes". We're past the point of treating these shows and films as their own genre because no one is impressed or grabbed by that as much as they used to be. So aim to aim to make this show the one thing we've SHOCKINGLY not seen done well yet: superhero science fiction meets young adult drama.
Functionally speaking, DC's sitting on Harry Potter meets capes with this, so I'd rather they do THAT than space teen cops. Especially when they're literally making both an Adam Strange show and Green Lantern show.