I would say something about how oddly human the pose looks even though you seemed to try with all your might to keep the horselike joint system in place, but considering what the show itself's been doing lately, especially in Sleepless in Ponyville, this is still much better. I guess your addition of the more humanlike-looking belly helps that illusion along as well.
Also, ponies in stockings. The next evolution of ponies in socks? One can dream.
I'm always impressed with how far you can push ponies while still making them look like four-legged creatures with bones and actual bodies and all of that. The show has always had them doing human-like "wild takes" but it's fun to push them towards being a bit more morphic in a different context. I've also given her very human-like hips here, for obvious reasons. I'd personally be very disappointed if ponies didn't have belly buttons.. it mans my elaborate plan to sneak up on Twi and give her a raspberry is doomed to failure.