it is related to the bones and their adaptation of the mmd model reference, what i was trying to say is that MMDD has those bone relation to reference in an external config file which you can edit, i couldn't find any for VMDplay. i am also not sureif MMDD is better as i didn't use it, i only tried VMDplay and it is not bad at all. by the way, check this post
here on how to make the heels to work using VMDplay.
check if you have "jiggle" or "boobsettings" plugins when you created these cards and if they are installed now on DX. you can check by opening KKmanager then go to the plugin's tab. if none of them is installed, install the one you'v been using on R4.1. both plugins can be found in "game folder/[OPTIONAL]mods".
i like this one the most of all your recent cards, the skin tone, eyes, hair and outfit colors works great, good job
. by the way, have you tried
hooh's deep eye shader and mod? if you are using the repack it will be already installed and ready to use, check the manual in that mega for the usage details. with your talent, i think you will be get great results with it.