I might be dating myself - years ago I worked for a transfusion service that manufactured packed red cells. CAP had required proficiency testing for the manufacturing process - if I remember, it was measuring the hematocrit. Just looked on the test menu and it seems that is no longer 'a thing'. So use the word 'competency' instead.
Our trauma program uses a lot of blood and liquid plasma before we know the patient's blood type - I don't think I would choose Group O liquid plasma even though it is low-titer. As I write this, I realize that I'm looking at the problem with a distinct bias against more work for my team so please forgive. When we implemented whole blood, I was definitely averse to splitting the product to create components because of the work - both physical and intellectual - and I am still thinking that way. If it is feasible for you and you embrace the process, go forth!