Master Yi actually is really strong right now
At least that's how I feel.
- He has fast jungle clear and can sustain with meditate quite well, keeping him healthier than many other junglers.
- Stalker's Blade (and so chilling smite) gives him an actual cc to be a threat for laners.
- Devourer is strong giving 2 stacks for all kills ánd assists, and you don't lose any upon death (like Mejai's).
- Games still go late often.
- Dragon buffs are ridiculous on Yi (6% extra AD, 5% increased movement speed and 15% more damage to towers after just 3 dragons)
- Inhibitor towers don't slow Yi during his ultimate
- Optionally can work around not having flash, and take teleport, which I find really strong to defend towers, attack towers and cut off runaways after skirmishes/teamfights or to just gank a lane from behind/countergank a dive.