Sated Devourer defies the philosophy of all the changes made this season
I recall Riot saying they don't want games to be decided just because you farm into lategame. Picking early game champs puts a lot of stress on them to actually take a good lead and capitalize on it. So they should get more meaningfull ways to do that and end the game before they get outscaled. A lot of changes this season have been according to this idea to counter lategame outscaling.
- Turrets are extremely weak. They deal low damage and fall easily
- Death timers are very long
- Keystone Thunderlord to maximize early damage
- Again global gold for taking towers
- First blood gives 400 gold again
- Adding Rift Herald for better early game lane pressure
- Changing dragon to take towers faster
- Increase in gold income/minute
- More items give high early game spike like Rageblade and other AD items
- Minions now automatically become stronger thus push lane when you are ahead
Therefore games tend to be more snowball and mistakes or a lost teamfight is very punishing. Games also tend to feel like tsunami's when once behind you feel you get behind more and more every minute as you are facing more and more obstacles to farm back in the game. This is to make it harder (maybe it is too hard right now) to turtle and try to get back in the game and try to outscale. In fact outscaling has kinda been removed from the game. (You never see that Nasus farming up for lategame anymore)
But there is one item that defies this logic: Sated Devourer. No matter what champ you are playing if you reach lategame with this item you simply outscaled everyone on the map disproportionatily. Compared to other full build roles like ADC/APC/Bruiser/Tank/Support you get best of both worlds without making any tradeoff in your build. The only tradeoff is getting into lategame. The problem with Sated Devourer is that you can build full tank after 1-2 damage items and deal the most damage on the map because it is sustained damage while also healing and tanking everything throwed at you. Compared to other roles full build Sated Devourer junglers are way too overpowered. If they get to lategame you might as well open mid. This is the real problem of Sated Devourer and the current nerfs to its early game damage and making it harder to 'Sate' is ineffecient because it just creates a bottleneck for champs who can still effeciently use this item and who not. So in the end if will only be efficient on Master Yi/Shyvana/Xin and it does nothing at sloving its lategame problem where it simply disproportionatily outscales every other full build on the map.
TL'DR: Sated Devourer junglers are currently the only one role allowed to disproportionatily outscale enemies. The current changes are not the changes needed to put Sated junglers at the same strenght as other full build roles as it will only hit those champs who already have trouble farming with it.