Honest thoughts: Starlight’s reasoning for all of this could have been better, for example, one by one her classmates got cutiemarks and left, until she was all alone, rather then just one friend left, etc, but apart from that,
the time travel plot, the alternate timelines, the dark tone of some of the worlds, the possibility, the magic battle, keeping true to the message of the show, the ending montage, the ending shot and the music notes…favorite finale so far? FAVORITE FINALE SO FAR!