Hey Riot you wanna know why adc's are building steraks
Its not because it's Op. Its because it's pretty much the only current counter to your precious assassins. You know...the class you inexplicably decided to buff with an item tailor made for them. An archtype that's so obnoxious to face as they really only can be counter builded rather than counter played against, due to ridiculous amounts of lcs big play kits that let them outplay anyone.
So before you nerf sterak's because people are constantly building it, look at the symptoms first. It's build purely because it helps carries to survive the instant burst of assassins. So hopefully they can actually survive long enough to actually play the game of league of legends.