@RiotAnimators: Cassiopeia's movement animation needs tweaking
The thing that has always bothered me most about Cassi (Visually) is her movement animation. But not because of the tail itself. It's the fact that, when she goes to move, her hips do not "fall" down to the ground. With her current animations, it almost looks like she has her legs together, and is slaloming downhill on a pair of rollerblades hidden inside the tail, rather than using the tail to slither along the ground. It looks incredibly silly and goes against basically every single portrayal of the Medusa archetype I've ever seen. It basically looks like, when Cassi was put together, they took a human from the hips up, and attached it to a snake from the neck down. This is convenient, because it allows her to retain more of a "human" height, but it just plain looks bad.
http://i.imgur.com/cW9hKcd.png (Awkward bending makes the slither look very weird)
How I imagine it, is that central point at the bottom of the gold hip-band armor piece should almost be touching the ground when she slithers, as she rolls her weight forward out of the "perching" I'm-gonna-strike-you stance that is her current "standing" animation set. All her movement would be in this lower stance, then when she comes to a stop again, she'd roll back up.
I think that would require you to also give her an idle-in animation since she didn't get that as she is an old champion, but anything that would make her movement look more like a slither would be great.
http://i.imgur.com/qkBkh5R.png (Cassi's slither on the dominion cinematic trailer looks very smooth)