They make it easier to kite jungle monsters. If it is possible to take no damage in the jungle as ranged again, it would be over all a buff for ranged junglers.
If it is nerfed because of Kindred, that would be stupid. They could nerf Kindred instead. I don't think Riot is that stupid.
I like playing Jungle Twitch, and since Devourer is disabled, I figured out that Warrior is stronger, at least in the mid game what is important. Devourer takes so long to stack, especially on a ganking Jungler like Twitch. And the sated bonus effect is op on some champions. It is a stupid item. Why not remove the stacking, increase the on hit effect to 50 from the beginning when you buy it, and remove the sated bonus effect? I am tired of this imbalanced boring bullshit.