The autoconforming way (crosstalk) depends on the order in which things are loaded and how the CR2 is built. It does go wrong easily, especially with multiple figures of the same type. 

Most vendors still use the crosstalk way of autoconforming simply because it works in all versions of Poser and DS and because they developed their own method of doing it.

The new (P8/P9) way is simply a matter of naming the morphs correctly. No special built CR2 is needed. As far as I know, there is no specific name for it.

Why doesn't every vendor use both methods?
Because sometimes they bite eachother (morphs are doubled). It depends on how the CR2 is built and crosstalk may get in the way here. Another reason is that certain users expect things to work a certain way, and that's what they do.

So the whole conforming thing is confusing and complicated. I don't think anyone disagrees here. But it is not going to change for gen4 because of compatibility reasons

For other figures there are alternatives such as for Posers own figures, genesis, dynamic clothing because the compatibility issues do not really come into play here.