Well, one of the things is that I have are the last vestiges of another guild's Iron BOD collection (they gave it to me when it filled an 18x18, before the vendor storage thing became common knowledge). I used them to train my blacksmiths up (filling the smalls). I have several filled sets just waiting for a large, that it just doesn't feel right turning full sets in as smalls after such effort.
I've had no luck in getting anything good, by turning in bulk numbers of iron smalls anyway, so I rarely do it anymore. I might after the changes go in, but the ones I use won't be ones I filled working up to 120, unless they are extras.
The plate EX 15s are definitely not gonna be turned in as small, as there are too few BODs as it is that can give the anvil.