What happens when certain items are more common than your liking in the future?
Your actions suggest another hike in CE cost to detract the buyers. The people who craft just passes the cost onto the buyers. The buyers see their energy devalue overnight.
Your approach is fundamentally flawed.
I find kind of silly how everyone is still pissed about the CE prices on crafting. Because of the Auction House, there's an incentive to hold onto crowns now. The CE market is actually dropping.
It's more likely that it will rise, eventually, but for now, this isn't a major problem. It won't be in a while, I'd say. It took weeks for it to get this high.
Note that I say on the CE prices: If you're angry on how Three Rings didn't warn us about this update or whatever, then you have all the rights to be angry.
Additionally, I completely agree that this was a ridiculously wrong approach, and increasing the amount of materials or crowns needed would achieve the same effect with way less hassle to anyone and everyone. Though it seems most people are just angry because of the CE increase in itself, not the approach they took!
As for another thing on unbinding: The cost to do this shouldn't be that ridiculously high... and obviously it shouldn't be in energy. That's just silly, and THAT seems like a money-grabbing move. It should be (at least mostly) in crowns, and shouldn't exceed 50% of what it costs overall to craft the item.
I also like Sirrocco's idea for this. Would actually create a difference in rarity between items.