I think it could be good, depending on how it's worked out. It shouldn't be anything like in
AoL, because that was atrocious; instead, consider a system vaguely similar to Final Fantasy 2. I'll explain:
You get several different stats: Sword, Archery, Strength, Agility, Stamina, and so on. Each enemy is given a rank from 1 to 8; weak enemies like Tektites and Skulltulas are rank 1, Iron Knuckles are rank 8. The rank corresponds to the relative amount of 'experience' gained for killing that enemy, and the stat that increases depends on what method you use to kill the enemy. For example, if you slay an enemy using only your sword, your Sword stat rises, and you'll inflict more damage and unlock new Hidden Skills. If you use heavy weapons like the Ball & Chain or the Megaton Hammer, your Strength stat increases and you'll be able to use these weapons more effectively and lift heavier objects. Agility is raised by running, jumping and dodging attacks, and Stamina increases if a lot of damage is taken.