Go ahead and keep posting! I liked how you made your story your own. Although Super is interfering with a lot of ideas I used to have for years, it's still fun to have those "what if" scenarios.
I've tried looking into the whole blue hair thing, and the only logical explanation that makes sense to me is that it was an animation error, and they just rolled with it. Toriyama has claimed in interviews that he does sometimes forget specific colors for certain characters, which is apparent for the original DB series, when you see Bulma's hair change from purple to blue. I also think the animators felt it was easier to just keep the blue hair in order to avoid confusion between the two Trunks's. And not for the the sake of the fans, cause that would be kind of silly to spoon feed us that much. No, I think for the sake of the animators, while they're in the process of making episodes.
Don't know about you, but the Trunks/Mai thing is starting to grow on me. I think it's sweet, and I can't wait to see Future Mai reunite with him again. But I hate that little Mai is so obsessed with only the Future Trunks and pays no attention to the kid version. It's the same person! Stop trying to pursue what won't happen, and work on what's in front of you! (Oy vey!)