The supposed content files they've hidden in the EC seem to make it appear as though they're extending the ending further (albeit possibly in the form of conversations). This may mean two things:
1)Bioware weren't working completely on getting the EC out to us in good condition with all questions answered, and were also working on paid DLC (even if it's free, they've still spent their resources and time working on that as well).
2)Bioware intends to "sell us" our endings.
Both lower my hopes. Combine that with the botch-up of the EC (which actually causes more logic failures) and very little true hope in the future of the ME franchise, and no, I will probably not be buying any DLC. To be honest, I will probably not even download a free SP DLC. Personally, for all they've done, I wouldn't really be suprised or care if they were cannibalized by EA, but I'm past that. The days I've spent devoting myself to these franchise won't go away if they go under, if they apologize, if they keel over and die. The damage is done, if they don't want to fix it. then the Mutualistic bond is gone. They have nothing to offer me, so I shall take my leave from the parasitic remains. If they do intend fix it in the future (and this time actually fully achieve the mark), then there is a chance for redemption, but if that never arises, then it is over.
To summarize: My faith in Bioware has been lost, twice. Given a chance to redeem themselves, they've not managed it. They have little to offer me (and others) that someone else cannot do better. As such, with deep regret, I will never buy any content from them again until this is sorted. If it is not, then surely if they are as good a games developer as they are, they can easily fill my spot with another person. You know, someone foolish enough to enter their parlour.