It really should have been a two parter to flesh out... well, everything. Also, not that I dislike Twilicorn, but some rare times I feel it was a pointless change. I mean, things did come about from it, but were they substantial enough?
That sort of upgrade in legal status and responsibilities can't have been easy, so I wish the show would delve further into that. I don't think the idea lacks potential, but as is it doesn't seem to have had much of a purpose.