Okay. So as many of you know, in every odd numbered seasons, we've had a recurring villan or two redeemed/reformed. 

.Nightmare Moon ( Princess Luna) in Season 1

.Discord and Trixie in Season 3

.Gilda, Diamond Tiara, Silver Spoon, Starlight Glimmer in Season 5

It's been a tradition going back since. Sure, I agree not redeeming all villains are realistic. I only think the ones that may have that kind of qualities could be reformed.

Since Season 7 is not too far ahead, we don't even know which villains would be reformed. Personally I think one of them should be Garble. Don't ask me why. But tell me which villains would you want to see reformed/redeemed in Season 7.