The Pefect Shen Rework
Another Shen Rework Idea, just way better.
WHETHER YOU THINK HE NEEDS A REWORK OR NOT CAN YOU PLEASE UPVOTE.
[Passive] Kinkou Order- Every 9 seconds shen next auto attack deals bonus magic damage and restores 10/20/30 energy, auto attack reduce the cooldown by 1 second. Additionally Shen takes 10% reduced total damage from critical strikes.
(You could keep it as Vorpal Blade it's just that it's a know fact ninjas throw shurikens and kunais not katanas or whatever it is shen uses.) [Q] Vorpal Blade- Cooldown 6/5.5/5/4.5/4 seconds. Costs 65 Energy. Deals 65/105/145/185/225 +65% Ability Power. Mark and heal unchange. Enemies marked with Vorpal Blade are injured and have their attack speed reduced by 6/7/8/9/10% for the duration of the mark. Dashing to a target marked with Vorpal Blade reduces the cooldown of Shadow Dash by 2 seconds.
[W] Feint- Cooldown 9/8/7/6/5 seconds. Costs 40 Energy. Absorbs 60/100/140/180/220 +40% Ability Power worth of damage for 3 seconds +1/2/3/4/5 for every 5% missing health. Feint removes all crowd control effects and makes shen immune to them for the duration. Auto attacks reduce the cooldown of Kinkou Order by 2 seconds while shield persists. If the shield has been broken shen is able to cast Crescent Slash within a time period of 3 seconds after the shield has been broken.
[W] Crescent Slash - Costs 25 Energy. Upon cast shen leaps 125 units away from cast direction, swiftly swinging his sword projecting purple energy in a 115° cone with a range of 375 units slightly knocking enemies back dealing 50% of the absorbed damage from shield as magic damage. Enemies struck are slowed by 40% for 1/1.25/1.5/1.75/2 seconds. Targets marked with vorpal blade who are struck are effected by Deep Wound, reducing thier armor by 5 and blead a value equivalent to the heal on vorpal blade.
[E] Shadow Dash- Cooldown 16/14/12/10/8 seconds. Costs 120/115/110/105/100 Energy. Deals 20/40/60/80/100 +100% Ability Power as true damage. Shen heals for 10% of the damage dealt per target taunted. Taunt duration increased to 1.75 seconds instead of 1.5. Hitbox increased. Restores 40 or 20 energy per champion taunted. Dashing to a target marked with Vorpal Blade reduces the cooldown of Shadow Dash by 2 seconds.
[R] Stand United- Shen can now teleport one ally along with him to target location. Shen can recast R to cancel the teleport, though still sending the shield.
Riot, please hear me out and tell me what you think. Also I think a Snake Eyes Shen Skin called Special Ops shen would be an awesome idea for an Ultimate Skin.
yours sincerely, ExecutorDill 
He has attack speed steroid, lifesteal, true damage ability, slow, armor/mr buff and CC immunity and attack damage steroid with his ult.
Sion has 2 knock-ups, a shield that deals damage, a slow and does a hell of a lot damage for a tank.
Thresh has an imobize ability that can pull him to, a shield that works on allies and can pull them into a fight, and an ultimate that damages and slows targets.
They both have the ability to slow as well as imobilize targets.