Hey, lets give leesin some new stuff.

Passive: Chi fist After using an abiliy lee sins next two basic attacks in three seconds will deal +0.35AD as bonus damage and slow enemy champions by 15%, stacking up to five times.

Q: Sonic wave/resonating strike Lee Sin shoots a 2000-speed wave of sound in a line, dealing 50 / 75 / 100 / 125 / 150 (+40% AD) physical damage to the first enemy it hits and granting true sight of it for 3 seconds. If Sonic Wave hits, Lee Sin can cast Resonating Strike within the next 3 seconds. After having traveled 175 units, damage will be increased by 1% per 5 units traveled.

W: Iron will grants a flat 10/15/20/25/30+0.5AP HP per basic attack

E: Cripple now increases damage from lee sin to a crippled target by 10/13/16/19/20%

R: Now deals an additional 1% of the targets current HP per 5 units traveled if they hit a wall.

Just... Something to specialize him into a role. With this, he loses a lot of the utility that makes him strong and turns him more into a melee carry.