Maybe it's just me but I don't see Plated Hull being all that good. Due to timing it doesn't work against Marksmanship, Advanced Targeting Computer, Static, Proton Torpedoes, or any other crit-granting mods. Remember that defenders mod attack dice before attackers do. So it's really only protecting you from nats, and only until you get your first real crit.
Someone want to run the numbers? I just don't see it. Far more valuable is the extra shield, but it kind of balances against the loss of blues. I definitely see this not far above the Rebel/Scum Y-Wings in terms of cost, except for the extreme cases of Anakin et al.