A new type of content.
I wonder why they haven't done something like squad based missions. The one thing that SW:TOR has that WoW doesn't, is the unique companion system. If they created a new type of content, one that involves all of your squad mates Mass Effect style, it should be a nice new content to play.
It will boost the economy because now you have to buy gear for all of your companions.
It should be nice content for solo players.
The last thing this game needs, is more single player content...