I always run a worth analysis with my gaming purchases. A hour of game play usually equates to a dollar of worth. That said this content has to have real replay potential to get my moneys worth. I would need to play through it a total of four times to get the value I expect out of my money.
I suppose that totally depends, on how structured the content is. How compelling is the narrative, and how unique the game play is. Are we looking at content in the form of say a Noveria, or are we looking at an environment such as Luna. The primary locals in the game are far more vibrant, entertaining, and in the final analysis worth playing many times. While the likes of the Mako navigated worlds are mostly generic, as in seen one seen them all.
I would gladly purchase another Noveria which seems to match the time span this expansion has, but I wouldn't be keen to play another generic rock. I have dozens of generic rocks to tool around on as is. I will give Bioware the benefit of the doubt for the moment, and assume its strong content rather then weak content. Looks like I will need to rearrange my purchasing plans.