I think it's pretty clear this has been driven by the D800.
Notwithstanding the informed and educated discussion regarding the capabilities of the D800 vs MFDB, the perception out there is clear - that there's little benefit in buying into the low-end MFDB's these days. And perception is all that matters - facts are irrelevant.
Once you accept that it's extremely hard to justify the increase in price to go for a low-end Hasselblad over the Nikon, you realize that if you want to sell anything like as many of the Hasselblads as you did in the past, you're going to have to do something pretty dramatic with the price.
Once the price of one product within the range is adjusted, the pricing structure of the whole range breaks down, and you have to take a hit on every product.