Similar to Dark Souls allowing for you use the tools or weapons with incredibly decreased effectiveness such as:

• Slower Attack Speed generic.attack_damage*0.5
• Lowered Attack Damage generic.attack_speed*0.5
• Lessened Durability
  Currently when you find loot if you don't have require level they just lay around in a chest until they get those required skill level this forces a player into a specific play still and would even a punish someone who wants to just play there way as well as adding a new inventory problem. If the modpack has a small selection of weapons it could then become a grind fest between tiers. This could extend to tools and armor as well. Regardless great mod so far.