Hextech Gunblade and Deathfire Grasp

So. Riot's original logic for removing the original Deathfire Gasp was "We did not want to give AP assassins another point and click nuke."

Enter Hextech Gunblade, which gives 80 AP (which is MORE than Rylai's Crystal Scepter), and gives AP assassins (Akali, LeBlanc) another point and click nuke that not only has fairly high base damage (253 at level 18, which is basically another basic ability's worth of base damage), it has a 30% AP scaling on it as well. Deathfire Grasp did 15% of a target's maximum health, but on anyone with less than 1687 health, just the BASE damage of Hextech Gunblade's active does more than 15% of their maximum health, to say nothing of the scaling on this.

All this is on top of the fact that the active SLOWS, and the item itself passively heals for 15% OF ALL DAMAGE DONE.

So...where was the logic in keeping this item? Even mages that do not benefit from AD (See: LeBlanc) seem to be building it, not because it is the end all be all item, but because THEY LITERALLY DO NOT FUNCTION WITHOUT IT. However, this is just leading to other champions being able to abuse the item because they were never designed to build it. However, the 80 AP on it is just too high to actually make it unattractive to people besides those who use both the AD and AP.

A parallel to be drawn to this is Guinsoo's Rageblade, which you don't see people without both AD and AP ratios building (except maybe Vayne sometimes but that literally never happens anymore).

So, shouldn't there be steps taken to prevent abuse cases and restrict the item to people who you MEANT to build it? Either that or remove it altogether and buff the affected champions, since Riot really hates spell vamp apparently (RIP Will of the Ancients) and giving another point and click nuke to champions (RIP Deathfire Touch).