Xin Main: Xin feeling pretty weak ATM :/
I feel like Riot's Balance Team probably aren't going to touch him (problematic kit, higher priority champs etc). But over the last two patches, my main man has fallen like a rock. Where my grievances lie:
- The game is focussed on early pressure, so Xin should be doing amazing, yet this guy takes far longer to clear than the following:

- He does less damage early, and therefore duels poorly vs the following:

- In order to feel like I'm doing anywhere near carry-level damage (something the early-focussed junglers do) I require a stacked Sated Devourer and Guinsoo's. This will on average be at 18-25 mins, leaving no gold for tank stats since you will be dying A LOT with this rush.
- He still drops off like a rock lategame, unless the enemy team allows him to walk over their DPS.
So it strikes me that he is currently a poor choice at ALL stages of the game, as the argument of "he wrecks if fed" applies to anyone. Farm-focussed for stacking Devourer? Go Yi, faster clears and better damage. Gank focussed? Go Lee, better gank paths and better map mobility. Dive the enemy backline a lot? Go Jax, better scaling and dueling skills. Want to be frontline? Go Mundo, shouldn't need to point out why.
His winrate picked up a bit last patch from the abysmal 45% he hit, but nothing about him has changed from what I can tell right? Guinsoo's got a cost increase, Devourer base damage was nerfed, but he still tanked quite hard.
TL,DR; Does he need some attention? His base values and clearspeed are quite weak for early-focus, particularly if he drops off later on. Maybe we'll just have to wait for a rework since his kit is pretty old and basic, not really allowing much flexibility for balance.