I respectfully disagree with the OP's perspective on the FX-8350 based on my personal experience and that of many other folks in PC enthusiasts forums. While Bulldozer was pretty much a lateral move performance wise, Vishera is a nice performance bump over Bulldozer and especially Phenom II in my testing and that of many other PC enthusiasts.
There are many poorly written games that do not begin to properly use the 8-cores of the FX-8000 series CPUs. This isn't the processors fault, it's the game makers fault for poor code. With well written games the FX-8350 is up to 50% faster then the Phenom II CPUs, which you would expect. Single thread performance between the FX and Phenom II CPUs is very close with the results varying a couple percent depending on the game code quality. While Vishera does have some performance limitations, many of them are resolved with the Steamroller cores - which is why AMD needs to produce an AM3+ Steamroller CPU.
As far as heat goes, 8-cores is going to produce more heat the 4 or 6 core Phenom or FX CPUs. That's obvious. The FX-8350 still has a max TDP of 125w but it does require a good cooler if you're going to be running it hard for hours such as with video games or Folding or similar. For typical uses a moderate sized HSF is fine. For overclocking you will need a highend tower HSF because Vishera OC's nicely. Many folks are running them P95 stable at 4.6+ GHz. including me.
What AMD really needs to do right now is deliver a socket AM3+ Steamroller based CPU to hold them over until 2015-16 when they will likely have a totally new desktop CPU architecture. A Steamroller drop-in CPU could provide a 15+ % performance bump over Vishera and this would be a good way to extend the value of the AM3+ mobos that AMD customers have and to draw in new customers.
It appears that Global Foundries has their 28nm process all sorted out and plenty of capacity so a Steamroller AM3+ CPU seems to be a natural to me.
The question is how do we start a survey on here for people to demonstrate their interest in a Steamroller AM3+ CPU and how do we get the attention of the decision makers at AMD to launch this CPU production which was originally part of AMD's roadmaps up until recently?
If anyone knows the answers to these two questions, please post.