My concern now, and question to the readers of this forum, is thus: when I open my RAW-files (DNGs) in Lightroom that I have previously edited in ACR, the changes made to white balance, exposure etc have disappeared.
Lightroom does not yet honor ACR edits, although the plan is that it will.
Another question plaugeing me is the way Lightroom parses IPTC information differently from IVMP. IPTC information added in IVMP doesn't show up in Lightroom.
I don't have a specific answer, but be sure to join the public beta forums and contribute points such as this - Adobe is listening to those comments.
As always, I would never use a beta program as a primary tool. Experiement and learn, but still to your existing workflow until the product is released.