Importing a bulk(csv format) of Group Contacts would be a great feature. Not only for customers having lots of partners but also for migration purposes.
Lifesize Cloud permitted to address new businesses which were still not familiar with VC. In the other hand, a part of our prospects already have a VC solution and is worried about the migration.
We rarely observe big bang migrations. We mostly migrate EPs one by one. In the meantime we need to make all the rest of EPs reachable and available from the cloud directory.
This topic can seem similar to Export of LifeSize Cloud Contact List from Management Console or Easily import user database to Cloud but I make a focus on group contacts, not users (even if I agree with both of these).