Balancing Rewards for "The Hunt is On!"

First off it should be stated that I have not played Rengar yet, but it still seems to me like the rewards for The Hunt are imbalanced and so I thought I would give my idea for how The Hunt could be changed to grant more even rewards to whoever wins. I may have no clue what I'm talking about though, so if there are any Rengar mains out there who have experienced The Hunt more than a few times and think it's fine as is, be sure to shut me up.

Now as for my idea, I was thinking that winning the hunt should affect Rengar's passive like how it affects Kha'Zix's. Namely that rather than giving another Trophy, perhaps winning The Hunt and gaining Kha'Zix's head would make it so Rengar only needs to gain 3 stacks of Ferocity instead of 4 in order to use an empowered ability.

Kha'Zix being able to evolve every ability makes him significantly more powerful and gives access to more utility rather than just straight damage, like the slow on Void Spike or more and longer stealth with Void Assault. I think changing The Hunt's reward to similarly maximize the benefit of Rengar's Ferocity would not only put it on more even ground with Kha'Zix having every ability evolved, but also be more similar mechanically and fit the thematic of Rengar and Kha'Zix being rivals better.