Guild Wars 2

I have not played GW 2 since early October, and I was wondering if there are any major changes to the crafting system. I was looking through all the patches and I did not see any such changes. For example, have the drop rates changed at all for rare crafting materials (totems, vials of blood, etc.)?

Drop rated changed for Vials of Powerful Blood (from bags), but doesn’t make a significant difference. The main difference is the botban, which explains the current high prices.

Nothing else has been changed to crafting since release though.