I'm only a 2-week old Brony, so this is a little deep for me. Learned a lot though!
For my 2 cents (2 weeks' worth lol), all I can say is that it seems a bit too early to make Twilight some semi-all powerful princess, unless Lauren Faust and company feared that the show would be cancelled soon and wanted to get it out of the way.
Otherwise, unless it's against MLP lore, I think it would be interesting to see ALL the ponies (Mane 6- love that term) become alicorns in one way or another (perhaps during "boss battles" when they use their elements).