[Q]

I don't think making the emissive armor big would help. SJ is right it would be unbalancing if you push the resistence too high. This is a very old problem I already had in SE III. The only real use I see for emissive armor is to make the total damage to destroy a component higher than shields per kT of structure but still keeping the emissive part low enough so that it is not invulnerable. Then you would have an effective alternative to shields but for the price that you must repair some of the armor after each combat.