Not that I even have rare to yet to waste on T8 carpenter advanced books that are not dropping as much as some us would like, can only hope that your looking into the drop rate on them there books and give us update on that issue.
As for lack stats on wearable items through out all the tiers comapred to RoK that is a big issue and know that it will take time to address, assuming that it is being address rather soon then later for this has been an on going problem since LU24.
I can feel for you in your position for you can't make us all happy but some of us are. I want you to know that I know you can only take one problem at a time and will wait as long as you aware and have plans to address them. I am asuming again that this is all with in your limits and allowed a course. 