Hextech Gunblade's active is too powerful and needs to be looked into

To a squishy target, that active deals 1/5th of the targets hp and it is accompanied by a 40% slow for 2 seconds. For the item's core users, its already very strong due to the healing and the active makes it blatantly broken. Think about Akali. If you can start a fight by removing 1/5th of enemy adc's hitpoints and follow that up with an execution on R, its gonna feel really bad for the ad carry player. Akali has been receiving constant nerfs since the rework, but her core item was never touched. Yet to this day Akali remains OP, atleast in high elo/competitive. Akali hasnt always been the only abuser tho. Remember ap Ezreal last season? The reason why Ezreal's Ap ratios got nerfed was that Ezreal players started building hextech gunblade and it was actually just broken. Come mid game, after landing your W, you could proc it with your E and add the Hextech gunblade active damage, and the target would lose 75% of their hp. And after the slow, a followup Q was easy to hit. Again, Ezreal's ratios were nerfed ( which i actually don't have a problem with, but this is to show the point ) but the item that enabled that playstyle was not touched. A third example would be Katarina. While she is not playable in competitive, in soloq she can be quite okay, in especially diamond and underand again that hextech gunblade active is just too good in helping her slow down opponents and burst them and often leaves targets helpless.

Maybe removing the slow from the active would be enough ( i dont think so, but it would be worth investigating ). Either way i would wanna see riot experiment with nerfing/removing the active and in return compensating the champions when necessary. Perhaps without that it would be way easier to balance a champion like Akali. In any case, i cant recall a single instance when the item was core for a champion that was in a healthy spot. We can all agree that Akali has been broken. Everyone who remembers Hextech Gunblade Ezreal can attest to it being absolutely broken ( the ap ratio nerfs even prove it). To fix Katarina's problems you need to rework her, but she aint in a healthy spot either.

Please, experiment.