1. Minor skill levelling that improve damage, usablity and durability. For example arrow recovery even with successful hit, Longer shield bash and stagger and under protection during animation, quicker charge attack, attack after rolling, etc. Also crossbows, throwable shield and dagger that you can both throw and grant huge stealth damage.
2. Unbreakable relic that discharge and loses unique propety For a while For over usage, like the master word, But you can still use them with extending charge time penalty.
3. More runes. Though the openness will be messed up if They are scattered throughout the world.
4. Repair weapons and improve them. Broken weapons still take up your slot though.
5. Auto aim For boomerangs and shield throw.
6. Penelty For using incorrect equipments, like fighting Someone with eletric element in metal armor.