Outlander, I think you're missing a few key components here.
First, those are all multi-threaded benches that can use as many cores as you throw at them. None of them are representative of gaming loads or even and typical consumer computing loads. Most consumers don't use anything that goes above two threads, let alone eight. And even so, the 8350 is barely squeaking by the 6600K even though it can handle twice as many threads. That's fairly embarrassing. Now yes, the 8350 is cheaper than the 6600K, so it has that going for it. However, in any task that is four threads or less ( which is the vast majority of gaming and consumer applications ), it appears the 6600K would almost double the performance of the 8350 ( assuming no other limitations, like a GPU in gaming ).
Second, the 8350 is a 125W chip. If you drop that into a lower-end AM3+ board, at best you'll get clock throttling and/or instability. At worst you'll blow the VRM. That means you have to spend extra on the mboard to even use the chip. Meanwhile, you can get an i5-4460 or 6400 for a similar price as the 8350 and drop them into any LGA1150 or 1151 board with no worry. The total platform cost ( CPU + mboard + cooler ) might be a little lower on the Intel side since the stock coolers work fine for them ( you'll likely want an aftermarket cooler with the 8350 ).
Now, if you want to pit the 8350 against a more comparable Intel chip, let's use the Xeon E3-1231v3. That way you're comparing two eight-thread CPUs. At $250, the Xeon is about the same price as an unlocked i5, except it can go into a budget H board. For the 8350 to even have a chance against the 1231, you'll have to OC it quite a bit. Once again, that means spending more on the mboard and cooler, which brings the total platform cost close to what an E3 + H97 board will run. So, assuming both those setups have similar performance and similar prices, would you rather have the aging platform that requires meticulous tweaking and configuration, or would you want the newer chipset that requires no OCing expertise that runs quieter, cooler, and on less power?
The FX-8000 line has a place as the cheapest way to get eight threads right now. If you just need eight threads for number crunching and you're not going for big OCing or tweaking, the 8320 is a decent way to go with a mainstream mboard and stock cooler. But the 8350 just isn't worth it at $40 more. Once you hit $180, you're looking at i5-4460 and -6400 territory, and that changes things a lot. Never forget that the CPU price alone isn't enough. You always need to consider the cost of the mboard and the cooler it will take to actually run the chip. The FX-6300 is a great low-budget chip. For $100 you get six threads and some decent OCing ability should you choose to use it. It's not as demanding power-wise, so you don't need a top-end mboard to fully support it. However, if you want to really push a 6300, once again you're approaching locked i5 budget levels when you add the cost of a cooler and premium mboard to the 6300.