Welp it's the same exact thing i tought when i saw that nerf. Tbh devourer is oppressive when champions that synergize with guinsoo pick up both the items.... Guinsoo is the problem, not the devourer. Yi has started to be a problem with guinsoo and devourer, with just the devourer he was something you could deal with.
Tbh i wouldn't pick devourer anymore after the nerfs... Is it really okay that just for the sake of not nerfing guinsoo we have to make devourer a secondary option when it should be a core item on some champs? I mean i think that after the nerfs cynderhulk/warrior and runic will look like a better choice instead of the devourer on those champs.