I work in a hospital system.
It is much more expensive to pay a pharmacist to do or supervise this thus as much as possible is policy delegated to nursing without near the medication mixing compounding training. The wildly variable results from this described in the article are derived from this practice. No I dont have good alternative suggestions likely to be tried.
Perhaps the hospital pharmacist could do a quick class for some nurses on the proper way to do it, and have the nurses so trained be designated for this task.