V&R you do relize once he puts blending in the game he'll either most likely make it a level 20 or 40 skill. Either that he'll make it where the gem you have to cast, much like woodcutting or mining. I suggest that if there is going to be a skill for blending I suggest a skill to detect someone that is currently blending.
And style I agree with you there. There needs to be sorting in the auction house. It needs to be sorted as such
Armors (Suiting low to high)
Weapons (Sort by type then by level)
Gems (Sort by type)
Trophies (Sort by xp per 1k)
Resources (Sort by type)
Epics (Sort by type/level)
In most cases above there should be at least 3 levels of sorting to go through.
1. Type (either it be trophies, gems, weapons, or armor) and once that is done seperate weapons/gems into sub-catagories as well.
2. Skill requirement (Lowest to highest from left to right)
3. Cost (If there is more than one of the same type of weapon *crushing* with the same level requirement then sort by cost)