Not approved. Usage based leveling was added with Daggerfall.

Barely approved. Weapon proficiency goes up as you use the weapon type.

Barely approved. A single spell levels as you use it.

Approved. Everything you do is tied to a skill. *Note: at the time of this review, in adventure mode you cannot craft, so crafting skills are unused in that mode.

Approved. Everything you do is tied to a skill.

Approved. Everything you do is tied to a skill.

Approved. Everything you do is tied to a skill.

Approved. Everything you do is tied to a skill.

Mostly approved. The only things not tied to a skill is unarmed, movement, and shouts.

Approved. Everything you do is tied to a stat. Tip: Don't heal until after the fight ends to gain HP.