How can you deny it when the chart is right there in front of you? Take a look at the past few months, its never gone down this sharply for this long.
Things are changing. Miners are quitting.
Yes, miners are quitting, asics are not. Sadly more than 50% of the hashrate is coming from asics, also right now it shows that the difficulty is going down but you need to understand that bitmain and co will be filling with more asics, so you will not see drop in the hashrate or difficulty for that matter. So for 100 gpus quitting, bitmain adds one asic to cover it for each 100 gpus hehe
The problem is that until there is a confirmed actual ETH ASIC, all those reports are still only RUMORS. I wouldn't factor them into the equation.
Anyway my point is that ETH difficulty has dropped and most likely won't be rising up again until we see the market value rise up again.