I'd like to start by apologizing for any mistakes as English is not my first language. I also have no intensions to offend anybody, just stating my humble opinion. 
Regarding the EC... it was OK. I agree with the most people here that it wasn't good enough to completely forget the awful, sloppy done original ending, but it sweetened the bitterness a bit. The fact that BW addressed the complain in the first place is much appreciated, although it is quite understandable (after all, we ARE the paying customers).
The problem I see with the whole series now is that BW was not able to "end Shepard's story" completely. No matter how much they have try killing him/ her, pushing to us the message that universe can still be a happy place even without Shep, lack of true happy-ending was not satisfying enough to believe that. Honestly, I personally would feel much better if they ended Separd's story by leaving him/ her just as it is and making Shep an Admiral in future series. Here, we have a living Shepard who does not need to be the main character any more, yet brings some connection to the previous games. Solved.
However, by giving us those endings (especially the one with N7 chest plate "breathing") BW has brought upon themselves a massive speculations. Just have a look through the posts: does anybody really care about new upcoming games without the Shepard as the main character at this time? Any enthusiasm about possible MMORPG or Multiplayer missions? The answer is quite obvious: people still want more DLCs about Shep. They went so far to get into the code to start speculations about Reaper DLC; they do not want to give up the hope on IT (disregarding how good or bad it is). They are even talking about having Shepard in ME4, which goes completely against the BW station that the third game is the closure of Shepard's story. It is a very interesting situation, because, in my opinion, gamers have now even more expectations for something to come after the end that they did before the EC. And many of us (gamers) want that "something" to be a rewarding happy-end.
In defense of happing-end (
which I personally would love to see myself too), I must say, that I disagree with the statement that in real live Shepard would've died. I am sorry, but this is not a real life, it is a fictional story. And I know plenty of books, movies and games where characters made it impossible... but survived and it was EPIC. If I want to see the real life, I can watch some News where good people are dying every day. Throughout all 3 games we were told that Shepard is the only hope (the "bloody icon", thank you Miranda). And to take this hope away just because nobody could survive three times in the real life?.. I just find it is the realism that is not really needed in this game.
As a conclusion, I can't say that I will not be buying from BW/ EA at all, but I would be very skeptical to buy any DLCs about Shepard that adds EMS (which doesn't really play any role in the game) and doesn't change the ending. I mean, what's the point if we all know that in the end Reapers will be stopped in some way and Shepard will die?