You can OC any ryzen cpu (well, except for the athlon 200GE) as long as you have an overclocking capable board so basicly a B or X series. Will it last longer is something pretty much no one can answer, I'd say it depends on if games get more multithreading support. I'm also not sure how good ryzen performs in WoW, you'd have to google that or ask someone else. May I ask at what resolution you'll be playing and if at 1080p what gpu? Generally you really only see a difference in amd vs intel in their high end cpu's when you start playing at 1080p with overkill gpu's.