I am sorry, but this rather proves to me that the FDA should take more advice, if they are going to claim to be the "be all and end all" in terms of ultimate authority.
I, and many people much more expert in the field than me (to name one, Dr Geoff Daniels), would agree with Dr Gandhi that serological ABO typing is far superior to molecular typing, BUT, the same cannot be said for RHD typing, where molecular typing is vastly superior to serological typing (not least because no blend of monoclonal anti-D reagent can detect all weak and partial D types, and no monoclonal anti-D has yet to be found that will not react with a Partial DIII).
It is also disappointing that Dr Gandhi is unable to use the internationally accepted terminology for the D antigen. Many, many moons ago, Dr Patricia Tippett, who, you will recall, did the original work on partial D categorisation, which, to a large extent, is still used,not least by the International Society of Blood Transfusion. Patricia pointed out that the correct terminology for the first of the Rh antigens was "D", and certainly not Rh(D). Obviously, Dr Gandhi is one of those who feel they are above and beyond the reaches of those who really know.
Turning to Dr Park, I would again say that ABO typing is, almost universally, better done serologically (I doubt anyone would argue with that), but that the molecular testing of the RHD gene and, by inference, the fact that they are far more accurate than is D typing by serological techniques. If this were not so, people with partial D types would not still be making allo-anti-D in the numbers that they are.
Similarly to the misuse of terminology by Dr Gandhi, I also note that Dr Park writes, "We use molecular-based testing for a lot of blood bank phenotyping now." Since when has a "molecular technique" in the world of blood transfusion been "phenotyping", rather than "genotyping". This is not just a mistake in terms of "blood grouping terminology", this is a very basic mistake in terms of biological science.
This brings me back to my question, do these "experts" make up their rules as they go along, or do they actually take any advice from the experts in the field, who wrote those two papers I cited in my earlier post? I must say that they don't seem to be that "expert" to me.