good luck hitting any of those weakpoints as you might be forgetting that under plate armor is usually chainmail and gambeson which will still protect. but as you wish back to topicKeep it on topic....what they may have wore and used is pretty unimportant in context of the story.
It's a high fantasy grounded in some real historic events. Who cares about little things, Ceo ain't making a descriptive accurate VN about the middle ages. Swords btw can also pierce as well as slash and all heavy plate armour has weak points at the joints. It sill doesn't matter though in this story.