What if Blighted items weren't called "Blighted" and didn't have the funky green look.
1) Rename Blighted Items to be something else... Artifacts? Barasavian?
2) Create formulas that are missing
3) Power up the items so that they can have 1 more tech slot than normal crafted items.
4) Make blighted formulas have charges so that they wear out and must be replaced.