Athletics and Acrobatics were really weird skills from oblivion. The skill increased no matter what you do so it was really silly. Not to mention they were boring skill overall... Athletics just gave me fatigue regeneration boost while acrobatics gave you higher jumps.
That's what I did as well. Just found the highest roof or cliff and repeatedly jumped off it. It was a useful skill for a thief to have, but completely immersion breaking to level up.
I think this is a great idea, but it will stink for me, as a total pack rat. I hope they don't make it too hard to pack around your loot... I like to try to sell a lot of itStrength no longer exists, actually none of the attributes exist, so as far as a know, it's just the weight. However, it could be that different types of material give different weights, like steel might weight more than iron, which weights more than glass. Not sure about that though.