Better Co-op Game mode

After fighting that final boss of 1.1, got me thinking "man kinda wish we have more of this type of bosses and have match making to play with other players" though most game modes have match making but it feels under utilitized as most of the content can be cleared AFK, hence we really need better game modes for coop gameplay and maybe reward for that grind is materials to craft weapon skin. That would help incentives players to play and grind that game mode.