The warlock set does have a 3D belt and it looks fantastic, it also has shoulder effects - which look incredibly underwhelming and after watching some fantastic ones like the rogues smoke effect, had me slightly crestfalling - partly due to the wings being no surprise (I'm sure everyone saw THEM coming), and partly due to how underwhelming both effects were, especially the shoulder fire.
That said - the threads digressing from the OPs problems with the T6 helms being changed to work via the challenge mode principle - which I'm afraid will probably just get written off as a necessary sacrifice in the name of challenge mode armor.