I have been reliably informed that if i have only one co op and i decide to remove them it would be wise to fill my other co op slot first.
No matter how many co op slots i have available i can not add a new co op immediately i have to wait 7 days.
I would like to suggest that this is...
It would be very usefull if the ability to invite someone to login as your account was extended to include specified tribes (such as those of your allies). Removal from that list would invalidate all such invitations.