BioWare games are known for their impressive single-player experience:
- Interesting companions
- a good morality system, with some plausible "grey-n-gray" mixed in
- Engaging story
- Excellent lore
- Effective, balanced classes
- No two playthroughs are the same between players
So if by multiplayer, you mean the sharing of different playthroughs, playstyles, and experiences on this forum, then I think we're covered.
But if you mean a game mode in the game that takes development time away from the single-player experience, then you are sadly mistaken.
If you want a multiplayer game, then find a multiplayer game like the ones you mentioned. We don't need another BioWare game to suffer the dreaded "multiplayer add-on".
To bad for you then that they haven't released a single SP game with those features since 2009.
They have though managed to create one of the best gaming experiences of all time - ME3 multiplayer.
"Impressive single player experiences" is a thing of the past for BW, MP is the new SP for them (well DAMP sucked big time but let's ignore that).