I understand that it could become rather quite powerful in the end, but in the beginning, it's effectively useless. 3 damage is way, way to low to start off with, in my opinion at least. It will take an immense amount of research just to get it back to where it was. If you feel a damage nerf is necessary, I'd say at least 25-50, considering it was at 75 normally last I checked.
The starting damage for this rebalanced personal laser defense was 5. And you're right it is a big debuff but intentional. I'll update the description so it's more clear what this mod does.
