Posting on behalf of client, a big drawback for them currently is there is no near-real-time model updates (publishing and processing takes hours instead of seconds), as compared to Glue. With Glue, users could make edits, post updates and refresh Navisworks data sets within minutes, live during the clash meetings.
They are excited to be able to map Coordination Spaces to folders that can also be a part of the Design Collaboration workflow. So they are experiencing great overall improvements and time savings in regards to gaining model updates from designers.
However, in the context of clash detection/coordination with trades and fabricators, a more real-time update is desired.