i'm an ex player of diablo 3
it's been a long time since I left diablo to POE
and i can say that : when POE will be release diablo3 will be deserted.
Technically, POE has released and didn't really make much of a splash.
POE will forever be held back by it's poor visuals and slow goofy combat. It's a niche game that is not designed to be a massive success.
that's funny their forums are 50x more active than these ones.
Actual forum users vs. in-game player base is normally 10x the amount. Except in Diablo 3 you even get bots posting goldselling ads. LOL.