Since BioWare has already pretty much given up on their RPG audience and wants to tailor themselves to mainstream/action gamers (example: the growing absence of RPG elements in each Mass Effect and Dragon Age games)…I feel that this is just one more blow.
I feel that some games don’t need multiplayer. Some games are better as a single-player experience, games like BioShock and now Mass Effect come to mind. Uncharted 2‘s multiplayer was surprisingly better than I expected.
We don’t know the details, but I am willing to bet it will feature a team deathmatch sorta gameplay style and possibly even a Horde/Beast mode type of co-op mode seeing that they announced the multiplayer so quickly after the success of Gears 3.
I am very negative about the announcement of the multiplayer right now, but hopefully after getting my hands on it I change my tune.