I ran into a problem with saving poses with PoseWriter.
I can get all the easy pose dials saved except that the ones in the SASHA POSE STRENGTH group are ignored.

I also noticed that the Posewriter does not set the easy pose dials in the body, but only the ones in the body parts.
The problem with this, is that you need to start with a zeroed figure otherwise the dials will double up.

I have a suspicion that this is because the body group is in the ignorelist for PoseWriter (it is the one which was in the sasha zip file).

Is this correct?

Apart from this problem I think what you have done is great. It is really a step forward for the original V4 and also a step beyond the previous wm version of V4.
Congratulations!