I don't understand why basic team deathmatch is not a permanent option. I'd put the objective gametypes on rotation based on if it's 3v3 (Elimination, Showdown) or 6v6 (Mayhem, Control, etc.) and replace the Control node with Clash. Leave Trials and Iron Banner separate from the rotator nodes since they are special events. If something new is added or returns (*cough* Rift *cough*) let it have it's own special featured node for a week or so.