I haven't really been able to play him since I notice in every single game that I've played today, Sion is immediately autolocked. From what I've seen (And I suck at playing this game), Sion seems to be a difficult champion to use. Either that, or the Sions on every single one of my team bought him and haven't played with his new playstyle in AI's or something.
So far, the main thing I have noticed on 3's from pretty much every Sion in my game both in the enemy team AND my own team:
1: Everyone loves activating their ult at base in Twisted Treeline and then crash stunning into the wall 5 feet in front of them. RIP Sion after Darius pulls you out of your own base while you're still stunned, q, w, hit twice and then ult back into death again.
2: Many try to charge up their Q's thinking that it's automatic, and then they get their Q cancelled and then blame the jungler even though they aren't in the same lane. Or they blame the enemy team for hacking or saying that his Q channeling shouldn't be able to be cancelled.
3: Charging headfirst into a turret is fun especially when the enemy team is hiding in the bush right next to the turret, all of them.
4: In my past 3 games with a Sion on both sides, there was only one Sion player in 6 that was not an enormous jerk. I know it will sound biased, but I guess with the remake, many Sion players must have also gotten toxic both in gameplay and communication. But I'm only doing a small sampling group. After I hit 20-30 games of somehow consecutive Sions on btoh sides, I'll be able to deliver a more accurate opinion of Sion players' personalities rather than just with a three game sample size. Even though this isn't directly related to the Sion remake as a character and mechanic-wise, it's still worth mentioning.
5: Grass must be pretty tall in the game now to hide an enormous probably 10 foot tall gargantuan of a champion in there without anyone noticing.
Edit: My mistake on number 4. I've had 3 games with Sions in it, but my last game did not have a Sion on the enemy team. I had a Lee Sin that was toxic on the other team both in /all chat and gameplay wise, ragequitting the game after. The Sion from my last game was toxic though.