The attacks needed for Yi to get his passive is decreased down to 3 from 4 with this item, then decreased down to 2 I think since Sated Devourer will apply off the second attack from passive. His E will always proc three times when he triggers his passive due to how it works as well, giving him a quick burst of 90 (+60% AD) true damage plus 180 magic damage (excluding MR) from Sated Devourer passive magic damage, plus any other on-hit items he has. I wouldn't be surprised if Yi started building Bork a lot earlier on with these changes, potentially dealing 24% of a target's current health (of course since its two attacks it isnt quite 24% current health, but somewhere around there) as physical damage. Its something to be scared of thats for sure.
Master Yi might be someone that you need to counter jungle against early on with these changes or ban him if you dont know how to counter jungle.
On a side note, other passives and other every third basic attack spells also got buffed by Sated Devourer. 3 Hit Basic Attack abilities now only require two basic attacks, with the on-hit effect applying on the Sated Devourer on the second attack. Other passives that also gain stacks from basic attacking also generate 2 stacks from a Sated Devourer attack so Jax gets 1/2/1/2 attack speed passive increases with his attacks, getting max passive in 4 attacks instead of 6. Same goes with
, who gets her passive every other attack now if she builds it instead of Runeglaive. Nocturne gets 2 seconds reduced from his passive every other attack as well, same with Shen. Shyvana gets tons of benefits from this item as well, allowing her to apply 3 on-hit effects with her Q if its timed to be the second attack, her W on-hit effect being applied twice, and her E being applied twice to the target (I believe on the E part). Uuumm... Twitch jungle applies two passive stacks every other attack now? Udyr gets a scary Tiger and Pheonix stance, procing his Tiger Form bonus damage and his Pheonix Stance going off every other attack. If you want you can build it on Volibear for double ultimate if you think thats worth it. Warwick passive deals a lot more damage and stacks up more quickly as well. Xin heals 50 health every other attack now and, if built AP, gets crazy healing.
Thats about it for the monsters. If you see a Teemo and/or Kayle be able to get it, run.