To each his own. For me D3 gear system is ruined, lack of soulbinding and abundance of bots cause devastating gear and gold inflation in D3. Item that sold for 1 mill a month ago does not sell for 50k now. Content is missing. You can beat the same act 1-4 million times, that's it. There is little that D3 has to offer in the grinding department. Just because the game is smooth does not mean it's an exciting game. The only thing that I think is worth doing in D3 now is forget gear and paragon levels and go finish some achievements. I really don't see any meaningful PvP happening when the gear system in D3 is in this shape.
PoE on the other hand has many more features to offer to players. It also seems like D2 sequel in atmosphere, graphics and features unlike D3. And it's free to play, so everyone can make up their mind about the game. From what I saw the only noticable issues with netcode were when using fast abilities in turbo mode, which is another feature for players to play around with in PoE and it is being looked at, so we will see how it goes.