Unfortunately, there is a reason you couldn't find definitive answers...
Lar mentioned a possible closed public beta test for D:OS (Possible Alpha/Beta Testing?
), so presumably there could be something for DC, as well. With previous games Larian has just had public playtesting sessions in their studio, for those who could make it there.
Nothing has been mentioned about DRM for DC, AFAIR. At least a couple months ago that had yet to be determined for D:OS (not that they'd necessarily have to do the same with both games). FWIW, Larian has removed the DRM from their previous games (DD, BD and DKS, with contractual issues preventing the removal from the original release of D2:ED), and now have more control since they are self publishing their upcoming games.
Welcome to the forum.