I must admit that i am not a fan of the multiplayer aspects of games and was skeptical when ME3 was rumoured to have this but as long as it doesnt affect the singleplayer experience then i am more than happy for it to be added. I just hope the devtime taken to make this mode wont result in less work being put in other areas... They can say this all they want but it will only be proven when the game is in our hands!

MAybe not, I doubt they'll restrict their user base like that but when they say "success in multiplayer will have a direct impact on the outcome of the single player campaign," To me that reads like you'll get different gaming scenarios and different outcomes to certain things if you play the multiplayer, even if it doesn't affect the final outcome of the game, so therefore the 'full' experience.