Currently, the unified targets for discovery are not used in order to build any plugin. Only the "multiple" ones are used in order to generate the necessary p2 repo, and the validation they're running is enough to guarantee that content on discovery files can install (if composited with TP).
So the unified don't provide any value, and even worse, the way they're validated can produce errors whereas it should work, I suggest we just delete them.

nickboldt WDYT? Do you see any utility to those unified targets?