Keep telling yourself that
In calculating gold per hour, I accounted time spent FARMING THE BOXES as we are directly comparing farming methods. So in that 1 hour I gather about 250-300 boxes which transfers to 5-6k sumptuous fur + 250-300 savage blood, worth 175-225g each on AH. So it's like 70+k per hour but OK you have to collect the work orders once every 3 days (takes few seconds lol) and posting this stuff on AH (also takes few seconds, hello trading post auctioneer built). Or using it to craft gear upgrades which maximizes the profit, squeezes that extra 1-2k per every 15 blood spent.
Once the barn is loaded up with those 250 boxes I can do whatever I damn well please. Level an alt, do some BGs, do transmog run, even... farm felblight!
Barn is my favourite feature of Warlords of Draenor by far. The best execution of delayed reward system so far. The fact that not many people think long-term in advance and understand the mechanics of it, allows me to use it with super effectiveness. I made 6-7kk gold in WoD and good part of that was thanks to Barn on 7 characters. Initially awful (trap ninja, traps didn't stacked at all) but then hotfixed into the best garrison system.
Anyways, enjoy your 8000g per hour from felblight while it still is 8000g per hour. If the drop rate has been buffed that much, it won't surprise me if it's 50 gold each within few weeks from now. At least I'll buy it out of AH and burn my profession materials. Some of my toons have 6-7 stacks of each by now and I can't keep up with savage blood to craft the lesser upgrades.