The main issue with the whole alicorn thing is that I have no idea how they'll be able to tie that in well with the confirmed 4th season. I trust the writers, but I think the princess upgrade is a bad move on Hasbro's part. Granted, it would make an exellent FINAL episode, because really, she's quite qualified for the position (if a bit impulsive) but I can't see the shpw going on if she's a princess in Canterlot and whatnot. Or Ponyville. I definitely think we should've had more seasons before this happened, but hey, we'll just have to see what happens in S4 because it's way too early to complain! I speculate that this coronation/whatever won't make Twilight an alicorn through S4, rather perhaps be a prediction of her future destiny, and S4+ will continue as normal, though with the knowledge that she'll be Princess someday. If they go that route, that's actually a pretty decent conclusion for FiM as a series. Though, I hope it doesn't end anytime soon!