The difficulty is the risk miners take and it's also been fairly standard practice that prices will drop to account for the difficulty some but I did not expect to be able to re-purchase the hashing power I bought for half the cost or less if you factor in store credit that was on my account. No the Furys were not half the price compared to when I bought, but I bought 10 and at the time they were $104.95 = $1049.50 which was more than what a War Machine ($849.99) was priced at by the time I received my order and that machine is twice the hashing power. And actually you could consider that if you receive their emails they have been offering $50 Furys several times since I've received my order which is less than half price...
This is a common practice in the industry. GAW is only one of many resellers, so their prices depend on the manufacturer. If you go to the Zeusminer store you'll see they have a different batch scheduled for every week and each has its own price. It's not only GAW that dropped prices, others did the same. And yes the big miners are usually more efficient and cheaper than multiple small units

As for the damaged insulation, it must have been damaged in the factory. I'd just take a piece of electric tape and get it ready to run within minutes instead of wasting time and money to send it back.