Sion balance changes

Sion doesn't currently sacrifice much damage in order to max E - Roar of the Slayer instead of Q - Decimating Smash. In return he gains strong ranged poke, which is making him a dominant pick not only in top lane, but also mid in some matchups. There are times when it should make sense to max E first (ranged harass, using the slow to make Q easier to hit), but we want to make this less of a clear-cut choice

goes on to nerf Q by making it scale by point to the old value, making E the clear-cut choice?

I'm super confused.