Does this really matter for my graphic novel?

its totally not an issue about the universe setting, acually its kinda a cool concept of having a futuristic world but the people in it deal with daily life stuff that we'd see in this universe, personally i havent seen it before and it could really work well. from the above it seem that you want to focus more on characters rather than the world their in, so why not state at the begining what type of universe its based on and leave it at that, if you worry too much about it, it might cause issue in your story later on. As for the two stories above i acually like them, there really good ideas, you're characters are believable and you've given the characters backstory's some thought aswell. i think you should defently keep them. dont think too much about the world that its set in, most of the manga's and stuff i've read don't really explain the world they're based in very well, you just tend to notice the differences from the real world yourself. hmm seems i really rambled on, my bad :/ anyway i hope this helps and best of luck!