Okay -- this is probably my last update on this issue unless someone brighter than me on the inner workings of Poser and V4 can further enlighten me. I will also post this in the other related thread for maximum chance of it helping others...

So I did try analyzing the geometry functions and deltas in the remaining 3 files I had deleted of the original NINE that DAZ installed in the V4/M++ shared Runtime that broke V4's open-close eyes parameter dial when they were present. However, without those files, although the eyes worked, NOW the Morphs++ head scale and whole body morphs DIDN'T work on the head part. IIRC, only the file: 05-ps_pe070_DAZ_ERC.pz2 seemed to have any function related to morph delta adjustments -- yet none of its parameters controlled the head scale. I reinstalled it in the Head folder and it broke the eyes without fixing the head scale problem. I then installed the other two previously removed files of the original NINE and the Head scale worked again -- but not the eyes. In the 05-ps_pe070_DAZ_ERC.pz2 file I noticed duplicate eye morph features and different deltas from the 05-ps_pe069_DAZ_ERC.pz2 file and thought that was conflicting with it -- so I removed all the items dealing with the eyes to see if that would fix it... but it didn't help.

Basically I tried every logical combination of those 3 originally deleted files of the original NINE to see if there was a combo where both the eyes AND the head scale would work, but none was found. So if I remove those 3 files of the original NINE the eyes work and the vast majority of the other ++Morphs work normally. But the head scale, some of the character face adjustments, some of the general face emotional expression adjustments don't work. It is interesting to note that in most of these cases, there are also right and left controls for the same parameter that DO work. Go figure.