Rarity, Applejack, Sunny and I had a chat about this, we've decided that a continuation is best for the community's RP. Writing backgrounds in is a good idea, and something you all can feel free to do, if you would like to. It certainly helps new RPers, and helping them understand and feel welcomed is what makes this community grow!
Progression can continue here as if it was on the same site. If for some reason you still WOULD like to retcon a character (reset them back to new), contact an RP Mod about doing so. Feel free to shoot me a PM if you have any questions.