My suggestions for this patch: play Xin Zhao as much as you can, because he's going to be nerfed again. After reviewing his new changes, this is going to be over powered.
His new passive gives him 15% armour pen on the enemy you challenge, meaning if you build a Brut or BC, and run the standard 25arpen runes, you're going to be dealing true damage to most targets.
His Three Talon Strike is now half the current CD at level 5, so you'll have it up almost all the time. He also gets bonus AD, and his attacks lower the cooldown of his abilities by 1 second.
His Battle Cry will now give the healing of his old passive, but scaling when you want it to.
I looked over his ultimate again, and noticed one small detail I missed before. For every enemy champion hit, he gets a bonus 25 armour and mres for 6 second. That means if you jump the enemy team, you're getting 125 armour and mres for 6 second. Most teamfights last about 10 seconds before one side is this clear victor, and it turns into a chase.
Xin is going to tear through anyone who stands in his way very easily. Pre-nerf Xin was probably the strongest duelist in the game. This new Xin is not only the strongest duelist, but a damn good initiator and tank.
I may actually try to play a few games with this craptop, just to see how broken this guy is firsthand. The forums are going to be shitting with kids asking for nerfs.