Ok so they essentially gave him a second passive, a better ultimate (I always felt his ulti had no umph in it), better late-game, and godly sustain.
I understand why they'd implement the first three things, but considering how hardcore they nerfed Irelia's sustain, I feel it's very odd for them to have given Xin sustain like that. Especially when they're trying to remove sustain from the game.
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~Peaf~
"Later that day, I f***ed a panda." - PSO