A two player mode is definitely a necessity for a game like this, for those who would rather not party up with too many other players and would rather just team up with their close friends, or significant others. 

I suppose this probably sounds like ranting or whining, in which case I do apologize.  However I do believe that this game could benefit heavily from such an addition.

(This was an edited post, due to me not noticing the Suggestions Box underneath the Gameplay Feedack Thread.  Don't mind me.)