It seems to be with hitting a wall when you are on your 85+ level. To upgrade your gear you are forced to insanely trade and grind, the lack of content of the game makes it boring really fast, and the lack of possibility of crafting your own gear is ridiculous.
It's what a hack'n slash game is, grinding and trading insanely.
As for the crafting there's possibility of doing some but the amount of farm/selling stuff/farm.. is absolutely insane to do it and improve the stuff.
I look at streamer like helmann from time to time and the sheer amount of this grinding/trading cycle to do so few craft is just something crazy.. i don't have this amount of time to begin with neither the patience to do it.
I accept it and i play as the casual gamer i am. I won't ever get the best stuff.. like when i was playing Diablo 2.. never had the best runeword or other things like that. But in the end i enjoyed my time.
The thing that make me play less actually have more to do with the fact that most if not all the skill point have to go in survival node in the 60 first level.. the tree give us the freedom to go wherever we want but the game itself make it hard to go for anything else other than life/es/res/armour and i find it kind of boring since the character equipment have to go that way too.