Why is Galio not included in the reworks?
This is according to RiotScruffy:
Things that we are currently working on:
-Ryze (duh) -Ashe (small scope) -Gangplank -Poppy -Taric -Urgot -Fiora -Shen -Yorick (just started, so a ways off)
This doesn't mean 100% expect to see these in the next year, sometimes things get modified or put on hold. Not every one of these projects is like Sion in size and scope as well, the update is meant to fit the needs of the champ. Also, don't have a lot of details to share on the specifics of these, but info will come in time.
Hope that answers your question.
He may seems strong, but he doesn't really fit into lots of meta currently, so I was hoping he would be tweaked around to not be so restricted into playing against just AP enemy teams.