I've been looking into getting CC3.  I wanted to be able to export to Blender for sculpting and then back to CC3 or Iclone.  I was exploring a similar pipeline to the link with Zbrush.  Anyone have experience with Blender?

If you try it one make sure the vert order does not change and 2 when exporting from blender make sure that the add leaf bones is unselected. Lastly when exporting i think you want the FBX export so that a key file is made with the exported file because when you import you need that same key when bringing the body back into CC3. It should ask you if the imported file is a morph from the base or from a source. before there was goz support this was the way to make custom morphs or new character bases, 

I don't use blender myself (I use zbrush). But there are plenty of tutorials out there for the CC3 Blender CC3 pipeline. Here is one by Mythcon, sharing his settings to export to blender and bring back the character into CC3. I'm sure there will be plenty of tips and tricks and workflows shown in those threads for the current CC3 Digital Human Contest 2020. As most developers will be showing their WIP and possibly workflows etc. 

https://forum.reallusion.com/456948/CC-Digital-Human-Contest-2020-Mythcons-WIP-2

Reallusion Marketplace Store
Content Store Featured Developer Page