I don't really think they're going to respect the rules on that point because I imagine many characters won't be able to carry anything more than their equipement.
This would also be boring in a video game where you sometimes have to carry things during a long time.
Pathfinder : Kingmaker is another way of inventory management : party inventory.
Why not, this is another idea.
As you said we'll have to wait and see about that.
In 5e, light encumbrance is move at full speed with up to 5x Strength; medium is at -10 speed with up to 10x Strength; heavy is -20 speed, and disadvantage on Attacks/Saves/Checks that use Strength/Dexterity/Constitution with 15x Strength.
In truth, most people would be moving at -10 speed most of the time with this system.
It is a variant, however and the Core system is just "encumbrance is 15x Strength." That would still put your average group about the same / a little lower than before, but it would have to be more spread out on characters.
