The backpack and Inventory system would allow people to have encumbrance and the ability to carry more based off of how much weight they can carry (This can be class specific), rather than just the four weapons and the armor pieces, a serf could carry a bunch of iron or silver in their backpack to transport back and forth. The more you hold however, the slower you go. You would also drop your backpack and items on death.
The backpack and Inventory system would allow people to have encumbrance and the ability to carry more based off of how much weight they can carry (This can be class specific), rather than just the four weapons and the armor pieces, a serf could carry a bunch of iron or silver in their backpack to transport back and forth. The more you hold however, the slower you go. You would also drop your backpack and items on death.