This is an interesting thread with a lot of well constructed arguments, and it's definitely a subject I think about often. Obviously, the answer to this question is highly subjective, and I don't believe there is a single right answer. I like reading everyone's opinion on the matter, though, and I hope this discussion goes on.
Yes, he got fodderized by Danzo... But he was what, a child ? 14-16 years and Danzo was a freaking snake with human experience. Also, he trusted Danzo which gave that bad man the upper hand.
Shisui's unique power was rellying on eye contact. How does Amateratsu work ? Yeeeesss, Amateratsu requires an opened eye so he can visually chase the target