I wouldn't really say there will be no bottleneck especially at stock speed, however i don't think that would matter for overwatch. An i3 6100 will be better for gaming though if you don't plan to heavily overclock the FX 8350 on a good overclockable board like the GA-970A-UD3P and with a good aftermarket cooler.
I worked on a few 8320 boards and all of them easily hit 4.00ghz without changing any other values besides the multiplier make sure the cooling is good enough doesn't have to have water cooling just adequate airflow i found it helps everything i throw at it fine