Most of the time when a long time single player series adds MP/utilizes a new medium for MP, I usually get quite peeved because the SP is left as a steaming huge pile of dinosaur droppings [Splinter Cell Pandora Tomorrow, Jedi Knight Jedi Academy].
But sometimes, game companies magically pull their heads out of their asses and deliver a MP that is grandiose, and appropriately compliments the SP [Splinter Cell Conviction, Assassins Creed Brotherhood].
So when I read that Bioware was adding a MP element to ME3, I thought "...FINALLY!"
I don't know about the rest of you, but ever since KOTOR back in 2003, I've always wanted some sort of MP for Bioware games. Where you take your pre-made Revans, Jedi Exiles, Sheps, and Grey Wardens, and pit them against other player's.
When I read about this, I was somewhat disappointed that you wouldn't be able to take your Shepards and use them in co-op...but this is still pretty damn awesome. Despite the shit with TOR, I trust Bioware to deliver in the SP department, as well as give us a MP that doesn't detract from the SP.