Just a short note: Plate armors seem to be notoriously nasty to pierce,
longbows (according to some) didn't pierce the better (note better) equipment
easily, (or atleast, the armor enthusiasts say one thing, the longbow enthusiasts
say another, however there are more longbow enthusiasts, how many people can afford to buy suits of full plate just to walk around in them). One thing is certain,
slashing weapons did do miserably against plate, or even chain for that matter.
still: chain should be DR/bludgeoning, why? Hitting chainmail with a mace would do
more damage than hitting bare flesh or leather, think of a giant many ringed stapler going right through the leather jacket underneath... or atleast, I'd recomend such, and it would make sense, would it not?
also, are you planning on giving AC and DR from armor?
maybe they could be seperated and just give a base "defence" for class levels, DR for armor? (3/4 of Bab perhaps) still, probably too much extra
Sorry to bother you again,