Yup, I pulled it in my Data Set and simply made the higher tech armors have a better damage/size ratio. I think its overcompensation from SE3 where EmArmor was EXTREMELY powerful..at least IMO.
Still, I'm thinking that you could make a component like 'Armor Belt' that has a large size and damage Ratio (takes 250 spaces and has a 1200 damage resist?) and then give that a '50-70' or so EmArmor rating...in essence, a ship carrying this wouldnt be able to hurt by weapons that arent Large Mount. Its big enough that only 'Capital Ships' would realistically carry it. Of course this is only a rough idea, but one I've been batting around for a while now.
But overall, the CURRENT EmArmors in SE4 seem kind of pointless...along with the Scattering Armor...crappy ratio, VERY expensive, and only blocks Scans...not overly impressive either IMO.
Once again, the true beauty of SE4 shows itself though...you can always change it!
Talenn