Just like probes in mining amp blueprints (which have been there like forever) or empty enhancer components, they bump up TT/click and bring down the average MU, allowing people who can't do math to keep up MU on other ingredients.
I'm more concerned about what response, if any, other planets will be allowed to have to this. 'Plain' LBC 10 (L) is a VU 15.2 weapon and has exact copies on Ark (S & B Ardenner 10 (L)) and Cyrene (Ozpyn BRS - P7).
Can't know eco yet but this 'adapted' has the same dmg as LBC 10 (L) (30, that is) and slightly faster rpm (57 vs 54).