My opinion is this... ARE YOU CRAZY EVERYPONY? Discord was main villain in one episode, ONE EPISODE, and you are acting like you knew him for life. Seriously, i don't understand why everyone likes villains so much, i mean, they are hurting innocent people ( ponies ) and enjoying every minute of it. If someone tried to kill you even if you didn't do anything bad, how would you react? In fact, i never saw Discord as totally evil, simply as someone who wants to be free and have fun. I am glad he has more depht than just chaotic fun guy, don't you agree? Plus, he is not only manipulative villain in show- what about Chrysalis? I hate her, but i see everyone likes cruel and evil beasts who would destroy us and our world if they existed. (sarcasm): Hooray for apocalypse! I am sorry for being rude. I am just stating my opinion. But please, could someone explain me why everyone likes those cruel beast who would destroy us?
I'm against it, Discord being reformed is as silly as the Joker being reformed and I feel if the writers continue on a path of him being 'good' I feel it would be a loss to the show. We need more manipulative villains like Discord yet they are sadly not as common, and was because of the cruelty and selfishness of his actions towards others that I enjoyed him so much.
You don't need to kill or physically harm someone to be evil, and I felt Discord showed this very well in Return of Harmony. As of right now, unless I'm proven otherwise, I'm treating this as him faking his reform. Though it is possible that he may have gained a fondness for Fluttershy thus making her his "Morality Pet" (TV Tropes) but even then I don't believe it will last.
I dont really like it because Discord was like the only Vilan and i though the final episode for season three was going to be like the Mane Six and the CutieMark Crusaders would turn him back to stone! me no likey.