Please give a new mode

This game desperately needs some kind of deathmatch mode. Take rumble straight from destiny, just something to try out weapons in a solo mode that's not unfun just to kill time. So many good things about the game but without friends online there's nothing that's fun to do. Rook is okay for a bit but quickly gets boring and I refuse to take my good loot into a fill match with two free kits as teammates. I just think an outlet to enjoy the mechanics of the game would go a long way.