To clarify:
1. When you reach 100 CP in both your professions, you open the nex Tier of recipes.
2. When you reach 200 CP in a certain profession Tier, you will receive a constant 6% chance to craft not common, but a rare item.
3. When you reach 300 CP in a certain profession Tier, you will receive a constant 12% chance to craft a rare item and 6% chance to craft a legendary item.
4. When you reach 400 CP in a certain profession Tier, you will receive a constant 24% chance to craft a rare item, 12% to craft a legendary item and 6% to craft an epic item. However, you will not be able to get a crafting chance for epic items in Tier 1 of your professions.
What is "rare", "legendary" and "epic"?
Each grade is twice better than the previous one. And it adds 2 additional modifiers in the stats.
Example:
The Simple Leather Armor has the following stats:
Armor: 32
Durability 29
Level: 6
The Rare Simple Leather armor will be:
Armor: 64
Durability 58
Intelligence: +(4-8)
Agility: +(4-8)
Level: 6
The Legendary Simple Leather Armor will be:
Armor: 128
Durability: 116
Intelligence: +(4-8)
Agility: +(4-8)
Vitality: +(4-8)
Dexterity: +(4-8)
Level 6
The Epic Simple Leather Armor will be:
Armor: 256
Durability: 232
Intelligence: +(4-8)
Agility: +(4-8)
Vitality: +(4-8)
Dexterity: +(4-8)
Gold drop: +(2-4)
Item drop: +(2-4)
Level 6
So...
There is definitely a reason to craft, don't you think?