A mini rework Master Yi could use to make him more viable at high elo without breaking him...
As the title says...
is currently sitting at a 48%-50% win rate:
http://na.op.gg/champion/masteryi/statistics/jungle
https://champion.gg/champion/MasterYi/Jungle?
Range increased from 125 to 200
Q: Alpha Strike
Cooldown decreased from 18/17/16/15/14 to 12/11/10/9/8 seconds
Damage increased from 25/60/95/130/165 to 60/95/130/165/200
Cooldown reduction removed
New Effect Alpha Strike now deals 150% bonus damage to monsters
New W: Meditate (50 mana cost; 16/15/14/13/12 second cooldown)
Passive: gains 30/35/40/45/50% Damage Reduction
Active: 's basic attacks heal him for 10/15/20/25/30 plus 2% of his missing health, but loses the Damage Reduction
New E: Wuju Style (30 mana cost; 12/11/10/9/8 second cooldown)
Passive: Gains 40/45/50/55/60% attack speed
Active: For the next 6 seconds, 's next two basic attacks are empowered, dealing 4/5/6/7/8% of the target's maximum health in physical damage (2% per 100 AD scaling) and slowing the enemy by 40% for each empowered basic attack (up to a 80% slow) for 1.5 seconds
Wuju Style's Active deals 60% bonus damage to monsters
Wuju Style resets 's basic attack timer
New R: Highlander (100 mana; 100/80/60 second cooldown)
For the next 10 seconds, gains 20/30/40 increased attack damage, 60/65/70% bonus movement speed, is immune to slows (but not crippling effects, such as attack speed slows) and can move through units.
These buffs should help to be a much more viable pick in High Elo and is much more balanced so that he can't melt a fully armored tank, such as a 
or 
.
