Well if you could fix it what would you wanna see? I figure you are the demo they are trying to get a hold of for the longest, the hardcore players some times can be whales, but the mtx on the everyday nerds brings in the good seasonal money. I think that the grind shouldnt be there at all, yeah the leveling should slow but the rates I saw were wow levels of grind for no real gains, sure you could place a node or two but I didnt see those being build defining (yet?), I play for the gear, sets or what ever, when I can finally spec out that uber break the fricken game build and then maybe farm up some gold for trading.
The MMO side of this game kinda makes tainting the world areas hard but they could offer dungeons that go odd places or something like candy on the map that you see once or twice in 8 hours. But for real, what would you like to see?