I think I get your idea @Threadstarter but from my side there are some other problems restricting me from using unique weapons and armors.
They look ugly (not all, but those which don't are useless ^^) and because there are only a few there are no choices.
Compare it to morrowind. There are so many (unleveled!!!) good artifacts why also looks cool and even if they are not that powered I used them for style like the BiPolar blade. But why use unique weapons with unique enchants when they are useless and don't look good? Why use Auriels Bow when you have no stats problems? Instead of cost reduce for magic schools I would replace them with +one/two handed/range combat enchantments
Sure, just from the stats Dragonborn DLC mask become more useful but, damn they look so ugly. Like all the other dragonpriest mask. Thats why I don't consider them to wear, even if they boost my damage by 500%.
Edit: Ah and I forget one of the most important things why even with 9999% stats in everything enchants like reducing magicka costs won't disappear or be less useful. They effect enchantments too even when you use the unofficial patch (so it seems like this is how it should be) so you don't need to bother reloading them with soul stones with is just a bother then a useful addition to the game (like it was with repairing your armor in previous TES games)