Once the AIB partners come out with their own PCB design with possibly 2 6pin or 1 8pin connector, the PCie power issue should go away. That would also allow the card to be overclocked closer to the 1500mhz mark, which in theory should push up the hashrate, making this a decent mining card.
Of course, those running 390s or 390xs shouldn't feel inclined to buy the RX 480s.
If the RX 470s clock 2-3 below the 480, that could be the better card for mining with a 110W TDP.
Cheers
From what I can see, the 480 is able to provide almost the same hashrate at half the power?
I think they should update asap

Compared to 380x, it might use 70% of the power and provide the same hash at the same memory frequency.