That's the problem with most unique stuffs right now. Except for Jewelry, most unique equipments tend to be weaker than epic and sometimes even weaker than Rare in stats.
And they only lasts for one level, once you level up, even a Unique weapon can be beaten by an Uncommon ones with one level higher. (e.g: Dallis lvl6 Hammer )
Which is kind of disappointing because they usually have thier own unique designs or recolored version i prefer.
another example: the unique armor sold by Hilde. It has x10 times the price compared to a common armor yet it armor stats will be useless after you level up past it.
ps: only way i think unique would works is to make it scaled atleast 1-2 levels from it starting level. Weapons scale damage, gears scale armors and keep it effectiveness around Rare level so it won't be too powerful. And players will keep it if they like them unique options with thier stats still proving to be useful at thier respective level.
