They experimented, it went wrong, the system was ditched.
Frankly they should have just made the roguelike/solo experience a fully respectable progression path for gear.
Barring proper integration into the gameplay systems it has no reason to exist, in that sense i agree with them. But is indeed the somanieth wasted system, and one that i am sad to see go; visions of N'zoth were by far the superior implementation, sadly, but a fun one.