Champions that still have clunky cast times on movement speed spells

I'll throw
on there too, but I think hers is a bit more justified than the others since it's a slow on top of an MS buff.
Proposed changes for each champion:
Decrease missile speed and remove cast time. This way it's not just instant damage but at the same time it doesn't slow Galio down to cast it.
Remove cast time. Straight up buff, but hey, GP could use one.
Same as Galio.
I don't even know where to start with Yorick, this champ has so many problems, but in an effort to not derail the thread entirely I'll just attempt to solve this one. Speed up his attack animation. Can't tell you how many times my Q hasn't gone off just because the enemy runs faster than my little hobble. Something similar to how Maokai's autoattack works when his passive is ready.