That collaboration class (went in cold) with a few high school students was one of my most interesting classes ever. We did some fairly cool problem solving, training a motion sensor neural network using our cell phones but for the Nano 33 BLE Sense. (Issue: how do the phones and the Nano lineup, all all phones the same?) We also had a few interesting screw-ups. I am trying to write it up as a blog.
Curious if in the future you are going to give more power to the owner, or leaving things as they are with everyone able to do all the commands. I personally would only allow the owner(s) to:
Invite other collaborators
Delete the project or all data.
Use the multi-select filter (A student completely innocently changed all labels to one label. LOL. Actually easy to fix since the file names reflect the original label)
The parallel training ability of collaboration might be something many people could be interested in, curious about costs.