I believe this 'simple art update' redraw was polled because the sheeta is one of the most loved species on the site, whereas the dragon wasn't nearly as popular
Saying that, us artists are actually listening to you guys, so you'll probably see us going back to polls (as long as you keep the crits friendly and helpful, and not OMG I HATE THIS! xD)
As to my personal opinion, I think the shading on this new sheeta is a little on the shiny/sharp side, although I find it hard to crit shading! I adore the anatomy though - I find this one much more graceful, structurally more reasonable, and more adorable. I found the old sheeta had legs that looked clumpy and malformed, the expression looked like it was caught in a car's headlights, although I prefer the old one's eye shape. I love the horn shape now, I think it's really interesting - and you wouldn't have to redraw the other pretty sheetas just to change the horn shape.
Edit: Also, on the subject of crits, try and be as clear as you can with them - we do listen, and it's likely small changes will be made based on the more helpful crits. We find when people crit with a lot of anger, we can't take it terribly seriously because it seems to stem from an extreme personal opinion, or a general continuing distaste at all the revamps
And a good place to crit would be the sticky in bragging and complaining, because the news posts get bumped down