BT T works great as a throw since you can pressure with things like BT7K to fish out a HiC, an advantage that would be absent as an OH. If it were made an OH, it would have to have slower execution frames, which I would not appreciate. And considering that BT 8T is already an OH so she has an OH from BT as an existing option already, I would rather BT T remain a throw as it is now for the advantages it currently contributes.