The 8350 will probably be a bottleneck on any current AAA title. It is an old CPU and is not that great. If you are going to buy a 8350, then dont. But if you already have the 8350 and want a GPU upgrade, then go for it as it wont be that far off.
A bottleneck just mean the weakest link. Every system has a bottleneck and pending the application that can change. So dont get hung up on the verbiage.