Blade of the Ruined King has the same problem DFG had
It does everything
DFG was an item which gave a ton of AP, burst damage, tank busting, sustained damage (because 10% cdr), and was good vs everything and good on basically all mages
Bork does the same thing for autoattackers, if you're a champion who deals a large portion of their damage as autoattacks Bork is never going to be a bad buy on you, whether you're a bruiser/assassin/ranged ad/melee ad