Shen could really use a rework, Riot.

I'm not sure how many times people already asked for this but when are you finally going to do some work on Shen? At this point he's just another relic from ancient times, not only visually but also mechanically. If you'd like a more insightful explanation on why he needs a makeover, I recommend reading this thread.

You absolutely need to get rid of his redundant ap ratios, there's really NO room for that in his build. You need to make his shield(s) scale with hp, he also needs more damage (make his Q a skillshot with 2 charges, one for each blade) and finally give him some free magic resistence per level, for god's sake. He also requires at least 345 movement speed, 335 doesn't cut it. You definitely need to reduce his cooldowns (or energy costs) to enable him to use his full rotation, because right now he's almost unable of doing so without hitting his godawful E.

The hitbox for his Shadow Dash is far too inaccurate and the punishment for missing it is just too great, especially when your opponent is capable of simply jumping away. Give him some stealth or just get rid of the taunt entirely, it doesn't fit with his theme anyway. Why not make it a multiple dash ability instead along with a sub-passive that allows him to dodge attacks? I'm sure you'd be able to come up with far greater ideas if you actually tried.

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Now let me explain you what Shen's greatest flaws are.

Playing Shen pretty much means that you're NOT going to win the lane since you'll never be able to outpush the lane opponent, nor will you ever be able to kill them with your pitiful damage. Most of the time you simply get forced back to your tower since Shen is unable to win any matchup in the long run due to his strictly defensive nature. Probably the biggest reason why this champion performs so badly (47% winrate) is his overrated ultimate which apparently justifies all the others weaknesses in his remaining kit.

Shen only exists to blow his global shield on a single teammate every 2-3 minutes and that's it - it doesn't even protect himself thus leaving him extremely vulnerable during the channel. He serves no other purpose at all. And pray to god your teammate takes the initiative, because most of the time they'll simply run away during the cast thus making your ultimate entirely pointless. Congratulations, you just left your lane for literally nothing while your opponent gets another xp and cs advantage.

Very rarely does his appearance make a difference since his Shadow Dash is far too impractical to use which makes him pretty much useless after both his E and R are on cooldown. Shen is far too dependent on high level communication to actually work, something which you'll most likely NOT find in a solo queue game. Right now there's nothing redeeming about playing Shen compared to every other tank or bruiser in this game. This absolutely needs to change, Riot.