"The abandoned plans for an eight-pin plug are even more surprising in light of the fact that this is a RX 470-specific PCB. It's not a re-purposed RX 480 design. Believe us, we're just as curious as you about Asus' thinking here."
This is because 8-Pin isn't necessary. So many people, so many review sites, all focused so much on the power draw and deemed it as being a "potential" issue, but it remains a non-issue. AMD offered a driver fix, just to shut people up about it, beause it was making them look bad, when it shouldn't have. To this very day, there is still not a single piece of proof, that any of the very few problems that have occurred for users of the RX480, were specifically the result of power draw. The only things that can be actually and scientifically deduced from those few problems were that there was "some kind" of problem between the the motherboard and RX480, but there is no evidence to suggest that it has anything to do with power draw. Considering also that the amount of problems that have risen for those using an RX480 amounts to less than 1% of all users, which would put it in the range of expected manufacturing defects.