The problem with theses so termed "new methods" is that they are not new, but they are suggested by people who might be "new" to falconry or at least do not have a grasp of its many different styles.
Thus the interpretation of the relevance is lost to those who are already great falconers, and will quickly see through the science & write the whole lot off as garbage.
The fault is not in the modern approach, but in the connection between it and those that can apply it species specifically..
I think a lot of these dead ends come from the geeks trying to apply the science in a broad spectrum fashion.. in some cases to try & fit in to groups when they lack any real hands on.