User blog comment:Willbachbakal/The Co-Op System/@comment-75.36.137.36-20130826093806

"Since this is co-op, you could be able to play with a friend, the AI or with a random player"

1) scenarios in chains like FarCry 3 so if you find someone worth playing with for an extended session you arent forces to seperate for  restarting some other scenario (obviously not needed if you play with a friend in private game).

2) AI - a hard thing to do - see what Elizabeth does for you in the game and multiply by about 20X as much scripting to make that AI a worthy ally (all the fighting and weapons and plasmids and tactics as flexible as you want the players  development/tech track to be  (Big Sisters in the game are a good starting point but I think it has to be alot more than that.    Not that I think it cant be done  (I want it to be) but you may have to fill-in  wiith something where YOU set the tactics more and they follow you (especially with the more number complex situations.in a spectrum of scenarrios)

3) the mismatch of abilities between the 2 co-players might not be too bad.  Damage is damage and the tech/skill progressions we saw  gave you more flexibility than super multiplying the fdamage you could do  (and thus you would have to adjust your actions to the other player instead of always playing every game exactly the same 'most effective' way)