I'm wondering if there really has to be such a finite end. I recall Larian saying that the driving motivation for the characters is to remove the tadpole, but what if there's another option?
What if you were going the evil route and wanted to embrace it and become consumed by its power?
What if you had the willpower to keep it somewhat suppressed while still reaping some of the benefits of its presence?
What if you somehow became strong enough to force it into a benign state and not have it affect you at all?
Personally, I don't look at it as a death sentence. I look at it as a tool to be harnessed to become something new altogether. To ascend. To dominate.
Good gracious, my Chaotic Evil is showing...