I don't know if this was previously discussed, but will new study groups need to be approved by you before they're added to renshuu? I feel like that would be important, because otherwise there might end up being a lot of similar/unnecessary groups that don't serve a purpose or confuse users as to which groups they should join
Yes, there will be an approval process - I'm not looking for tons of micro communities with <10 members, so I am aiming for ones that generally have a broader appeal.
Are you referring to studying a list out of the study group? The mechanics for this work the same way that they do for any lists under Community Lists, and so it'll give you every new term in that list. You'll need the list added to a schedule to pacing control.