IMO BORK deals too little dmg on its own, without arpen, but chars who may want bork can afford or dont want arpen. e.g. i always want to buy it on ww, but it feels weak without LW, but lw doesnt fit into item build and ww deals mostly magic dmg with ult+wits. And for carries BT is clearly beeter ooption for lifesteal and overall. BORK just has no place on anyone.
Its silly idea, but maybe it should deal %hp true dmg? its just magic dmg doesnt working (see madreds removing), phys dmg not good as well due to itemization priorities.