This is stupendous! Some people would complain that you left Luna or the CMC out of the picture, bit I'm just glad to see Spike - the lead character's most familiar and supportive friend - in there where he should be. Too many people love to pretend he's not important, and alienate him from the cast.
Trixie's presence is amusing, flying like a witch and taking advantage of those two chuckleheads. I also love the sight of Zecora repelling down the side of the balloon; from Pinkie Pie, that type of think is expected, which is why it's more interesting to see Zecora doing something nifty.