No specific announcements, no, but what they did post makes it sound (which is just what I wrote) like they will keep some layers.
" BoM will be an addition to the Lara mesh body, not a replacement of anything. We fully understand that many of you have invested a lot of time and money in both buying and creating appliers. We also expect that for certain things the use of appliers and dedicated layers might still be preferred. "
" We have been re-thinking the layer system and how to best use it in a world where BoM exists. "
Yes, it COULD mean they will also go for a separate body (and I hope that is the case), the wording just didn't quite sound like it to me.