I have several existing groups in my contacts list. (my family, my husband's family, a group of friends, etc) 

Before the format change, I could click on the group I wanted and add or delete people to or from this group, for example if someone had died.  Now when I try to "manage" the group, the only options are to delete a group or add a group. 

I don't want to "invite" people because the purpose is not to communicate back and forth, it is only for my use to send a general message to all of the people in the group that I want.