Who even thought it was a good idea to put multiplayer in this title? FFS. I don't want multiplayer in my single-player shooter. I want a challenging, immersive single player campaign with an interesting story and cast of characters, paced well to tell the story alongside the level design and progressing, evolving gameplay.
THat is what BioShock did and did brilliantly. Stop cramming bollocks multiplayer into games that don't need it and concentrate on the best single player experience you can make. Multiplayer won't sell any more copies, won't prolong the life of the game whatsoever (check how many BioShock 2 multiplayer games there are right now, worldwide, I dare you!) and will only waste developer time, compromise level design, balance and the length of the SP campaign.
If there are any other modes, please 2K for the love of all that's holy, drop them too! BSI is looking to be a brilliant, immersive shooter. Do you want it to remembered alongside classics like BioShock and Crysis, or rubbish, forgettable titles like BioShock 2 or Crysis 2?