5.16 will screw up balance entirely
With armor items becoming less efficient than AD items, the meta will just become "whoever snowballs first, wins".
Have you forgotten why armor was made this strong in the first place? It was to prevent the previously unavoidable snowballing after 1 kill. If AD is the best option whatsoever, even against another full AD, then it's just about who has the most gold to spend on AD will win. (Note I'm talking about AD vs AD matchup in toplane).
Building early armor was a tool to stop getting raped in lane. You're against a riven that nearly kils you in one combo? Better buy armor next time you B. After this patch, your armor won't do sh*t because it costs more for less. You'll fall behind even MORE if you buy armor. Dead Man's Plate looked like a good substitute for Randuin's for toplane, but it already got nerfed aswell before it is released.
Why is Riot focussing so damn hard to nerf armor into oblivion? I would be fine with a small nerf, but they're nerfing it through the roof! (Or should I say floor). Imo all nerfed armor items should get 5 armor or 50 health back AT LEAST. (maybe except thornmail, have to see how that one turns out)
But meanwhile Devourer is still balanced, right?