I honestly thought it was going to throw out the usual stuff just for sake of having more Discord, but then it turns out that it is a Fluttershy episode with Discord as a plot device to help develop her. It certainly did move pretty fast (it could easily have been a 2-parter for a more organic conclusion), but as far as doing its job goes (in fleshing out Fluttershy a bit more and showing how far her assertiveness has come), it did its job.

I liked it pretty much throughout, but I will agree that the ending was kinda rushed and wibbly-wobbly.

Still, pretty super episode.

Yup. A lot of episodes this season have come off as rushed. I get the feeling a lot of them were not written for the half-hour format.
But otherwise, yeah, good episode. It could have gone a lot worse, and really didn't.