I dislike how both camps pose their opinions without any substantiation.
I have to be dismissive to the main argument of "combat feeling clunky". This is fully intentional and i love the aspect of the game where, as you progress in levels, you can almost feel like your character has learns to fight better, faster and smoother. I am not saying it is perfect, but i am saying that, in my opinion, it is a more interesting combat system as compared to from-the-get-go smooth D3's combat system. Face it, by the time your character is level 20 the combat does not differ greatly all the way until para 100. In comparison, my duelist felt like an elderly school janitor with a broom up until level 10, progressing to normal human being around lvl 15, to actually feeling combat worthy shortly thereafter, to absolutely insane ambidextrous circus freak around level 45. I am not sure how much better it will get, but yeah... i FEEL the power progression of the character.
The barter system is very new. As everything new, it will cause resentment, any change does. It does feel awkward (not complicated at all, once you learn values of each token). I am not sure if this will alleviate the issue of farmers, but i dont think it is quite a point of it. If we look into the actual r(role-playing) factor of aRPG, according to story, you are on god forsaken island, exiled from any meaningful civilization, where gold has virtually no value. Instead things of value are actually useful. And i think that, once we get over our own resentment to change in established way of things, they system will actually prove interesting. Also, it does provide constant "gold sink" that is so very effective that i cannot even fathom another more effective system in that aspect. If we compare such a system to D3, for example... well, you know, 2billion gold items and all.... simply because AH limitations.
Furthermore, it does provide incentive to actually COMMUNICATE with people. It is a multiplayer game. There is virtually no reason to mp in d3 aside from ubers. It does not make the game either simpler nor more rewarding.
Also, looting system that is almost free for all (i can get into details). a) in mp games you get a significant bonus to item quality and quantity, but since it is NOT instant, you are not guaranteed to actually get any loot unless you are paying attention. So no more spin to win... you actually have to LOOK at your screen while you play the game.
In conclusion, i feel that even those two point that i had underlined, the ones that people actually bring up against PoE, make the game better than D3. And trust me, there are many more, better, stronger points in favor of PoE over D3. D3 is "polished" one can say, but that is about it. Its a boring, pointless, yet "polished" game.