Your Top-3 drawbacks of the Nikon IV

I've read the reviews, but would like to hear from real users, like you.

I'm considering this camera mainly because of hearing how quick the AF is, and that it just might work well for sports.

That said, let's start out in a negative vein first. What do you feel are this camera's (or camera system's)main shortcomings? This website (dpreview) feels it has some; as they give it under 70 points....not real impressive. Yet I have been advised repeatedly to not count it out until I do more research.
So, "let the games begin". And, thanks in advance.