[Taera]

Organic Armor is not supposed to be the best armor in the game, hence the low cost. Same as with crystalline. It is supposed to be something "different" and it is, only the regenerate-after-combat makes it worthwhile in my eyes. And for the defense/per/kT remember that in fact the armor is vulnurable only to two weapons - NSC and CSC while shields are vulnurable to Shield Sapper & Distruptor, NSC, PPB (normal), with a total of 4 - double. Shield Sapper is extremly powerful weapon if used against shields and one this makes the organic armor cost the racial points - remember that 30kT of organic armor ships would build at least 1 turn faster than those using normal armor, especially if it is some kind of more advanced scattering/stealth/emmisive armors. Crystallines are good here too because AFAIK they are the cheapest armor aviable, and the 15-to-shields works as good as emmisive armor if there are any shield regenerators.