I (mostly) support! Here's my opinion on the topic.
Right now, zombies have exactly 1 chestplate of armor. It can't be seen and is removed in 1 hit. This makes an iron sword take 4 hits to kill one. What if they could be wearing chainmail armor?
Zombies and Skeletons might come wearing chainmail armor, usually just a helmet and boots, and they will get the damage reduction from their armor. If it's a rare drop, they also drop what they're wearing. Of course, somewhat damaged.