New crafting idea for Netherite items

Currently we can only upgrade our Diamond set (tools & armor), but what If we could make a better items, made like a Diamond set, but with Netherite ingots. The stat of these items would increase by 2. For example, Netherite set that was made by Smith's Table can gain only AKB +1, but if the player crafts it fully, it will get +2 AKB for each piece. We can make a very expensive block, called Netherite Block, that's hard to craft, so why we cannot do the same with our equipment?