AMD has made it very clear they will not be using this for the desktop, nor should they. Sure, people will whine, mainly because they like to, but this would be a worthless product if they didn't limit the scope of it.
It's not going to perform as well as a Piledriver core, which will remain their high-end desktop part. They couldn't do it, and didn't try. They are still stuck on 28nm, with a bad CPU design, so they just want to focus on a small portion of the market and get it right. So, they no doubt sacrificed things that are not needed on the intended platform, like a lot of PCI-E lanes, and high clock speeds, to maximize performance per watt in a limited scenario. It was the correct move.
The Puma based Carrizo-L will also be using that platform, which should give you a clear indication isn't not going to be a higher-end desktop platform.
AMDroids have to realize, AMD can not make a competitive part on the desktop. Not in 2015. They aren't going to go out of business trying to cater to people wanting to kill the evil Zargons, who also want an AMD CPU. They can't do it, so aren't trying. They feel they can do well in the segment they are targeting this processor at.
Just get an Intel CPU. Simple. That market is amply covered by Intel, so why complain about it? There are excellent high-end CPUs out there, and AMD can't hope to match them. So, buy Intel, be happy. Or wait until 2016. AMD will be releasing Zen that year, and it may be what you are looking for. That's when they get another crack at it, and you can be pretty sure they'll have some high-end chips that bury their current FX offerings. Whether they are as good as Intel's, that's another story, but it's almost a certainty they'll be far more competitive than their current stuff.
So, they did what they could with what they have to work with now, and it was a good choice. 2016, they'll have new choices, and if you just won't buy Intel, you'll no doubt find some of those products meet your needs much better than those out today. Just give them time. Again. And let's hope we're not disappointed. Again.