HERE IS MY IDEA FOR A REWORK:
Passive- Ki Strike [Unchanged] but in addition shen takes 10% reduced total damage from critical strikes. Restores 10/20/30 Energy.
[Q] Vorpal Blade- Cost 65 energy. Deals 65/105 /145 /185 /225 +65% AP scaling. (Range increased to 500 from 475). Healing values untouched. If shen dashes to a target marked with Vorpal Blade the cooldown of shadow dash is reduced by 2 seconds .
[W] Feint- Cost 40 energy. Absorbs 60/100/140/180/220 +40% AP scaling and 1/2/3/4/5 every 5% health missing. (Basic attacks on shield reduce the attacker's attack speed by 5% for 3 seconds). Shen is able to use Crescent Slash within a time period of 3 seconds after the shield has been broken.
[W] Crescent Slash- Cost 25 energy. Shen takes a small jump of 100 units away from target direction swiftly swinging his sword in a counter strike motion, the blade projects purple energy in a 115 degree cone with a range of 350. Dealing 50% of the broken shield as magic damage, slightly knocking back and slowing enemies hit by 25% for 1.25/1.5/1.75/2 seconds. Damaging a target marked with Vorpal Blade will consume the mark and cause them to bleed hp equivalent to the heal on Shen's Vorpal Blade.
[E] Shadow Dash- Cost 120/115/110/105/100 energy. Deals 20/40/60/80/100 +100% AP scaling as true damage. Shen is healed for 10% of the damage dealt per target hit. (Hitbox Increased). Taunt duration increased to 1.75 seconds from 1.50 seconds. Enemies taunted still deal 50% less damage to shen but shen now only restores 20 energy upon enemy hit.
[R] Stand United- Unchanged [No complaints there!] But as an idea shen can teleport one ally to target location once they stand withing the teleport radius and right-click on shen while he is channeling. Shen can now cancel the teleport by recasting R. No Cost. Cooldown Unchanged.
Riot I guarantee if you make these changes, people who love to play shen will never complain again, i'm sure you can take my idea and balance it out. You will notice that shen will still have energy problems with this set up, which are massive early game and will only be able to do one full rotation under the circumstance. Giving shen this counter damage ability allows him hold unto his E for more important circumstances like securing a kill, keeping enemies of allies or escaping. It takes to much to play this ninja and you rarely come out on top, this extra damage will benefit shen while waveclearing minions and combating in lane see as every champ he is picked against has an ult that will help him in lane so no matter how good he is doing, he falls off when they hit lvl 6, the change to W will change that while making the damage more situational and shen more interesting and difficult, Zed has a W that can be cast twice and in coordination with all other abilities, that also increase their damage, why can't shen? The shadows gave Zed power, that doesn't meant that the fighting style he learnt from shen's father has withered.
sincerely, another Shen player 
per the usual then go for 
and 
, follow up with 
, 
and 
. You should be able to proc your passive very often and maintain full energy at all times.
, 
, 
, 
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) he gets great damage and can tank a great amount.
