Additional Collaborators in Spaces

I would like to add the ability for more than 2 users, it would be wonderful to add internal users for the full account team, sales to add goals that came out of the sale and be able to see CSQL in the pipeline,  it would be incredibly helpful for PS to add goals and add records to low volume objects, and I also think you should be able to set permissions on what access the invited users have, such as can they add goals and tasks? Spaces could be a very collaborative experience.