Plate mail should have slightly less normal defense in exchange for 1 more HP plip per armor peice. Makes it more well rounded, pure normal on a 2* is fairly useless considering most monsters from strata 2 and up don't deal normal. Adding more HP and less defense makes it more well rounded, since HP applies to all damage types.
Also, would anyone like giving it some peircing by default, making ironmight more like the rest of the line? Would be good for pure demo recons in LD...
Speed loss+bombs=bad. And almost no one is pure demo now, RSS was the only damage bomb that worked well. Piercing inherent doesn't really make sense. I like more HP and less normal defense, but not too much or the extra HP counterbalances the speed loss in LD.