Yeah tht bs about Sony devs shouldn't add mp components was hilarious, fallacious talk especially considering that what made UC2 and TLOU such big hits and added to their value were the insanely good mp components. Now ppl wished abd bitch the remakes don't get remade mps. Those series mps can go against any of the so called goto mps and win in overall quality.Naughty Dog wanted to make the Multiplayer. They even said they wanted to compete with the big boys Battlefield & COD when they made Uncharted 3 Multiplayer back in the day.
As for Factions it was initially meant to be bigger but they kept rebooting it since it wasn't up to their liking, but definitely not an accident.