Ha! Funny you should ask. I do have one license of BIM 360 Build. We wanted to test the Meetings tools and possibly use the Checklist tool to help with Design process and workflows... As of today though it has not been changed to Autodesk Build, similar to BIM 360 Design changing to Autodesk BIM Collaborate Pro. (Geez). So in short I do not have access to the Autodesk Build product to test how the new ACC products work together.
Once good thing that has been added from BIM 360 Build to the Autodesk BIM Collaborate Pro was the Meetings. Go figure.
Talking to my reseller, Autodesk does plan to provide Autodesk Build when it is renewed? Not sure what that means. Even our resellers have little information on the new products. We all learn together I guess the hard way, again. (Forest Gump).