Il Divo wrote...
And yet, your understanding of ME3 would not be lessened the slightest bit without Javik's presence. I bought the ME3 Collector's Edition so Javik was provided free, but I didn't install him until my second playthrough. There was no point where I thought to myself "it feels like I'm missing something critical". That I consider the Protheans so intriguing is exactly what would make such an idea great dlc.
Yet "understanding" has nothing to do with it. It's a Prothean. The most talked about species in the entire series, even moreso than the living ones. It's "Prothean artificat this" or "Prothean ruins that" through the trilogy. ME3 is even about building the Prothean's version of the Crucible and discovering what it does and what the Catalyst is to activate it.
If the entire trilogy is built around the concept of a mythical race and then you dangle the ability to not only meet one, but to actually have them as a companion (meaning multiple conversations and development)... and then you slap a price tag on that, you're going to get complaints. I don't care if Jahvik couldn't be unlocked until after the Reaper invasion was over - you're going to get complaints. It's a bit of a d!ck move, honestly.
Note that you didn't mention Omega in this... mainly because Omega is a standalone mission, not tying to the poorly done endings or providing closure to a series that ended abruptly and violently, leaving fans feeling hollow and jaded. It was just content, content that stood or failed on its own merits. Which is how DLC should (in theory) work.
I specifically didn't mention Omega for a reason. The exact model which you recommend for Omega is exactly the sort of thing which would have lost Bioware a sale, at least from me.
I could use Lair of the Shadow Broker or Arrival as examples too of content which fans have demanded be given for free. My point is: content which someone deems valuable or significant to the main quest is more likely to generate interest rather than content which is a complete throw away.
Overall, I'd rather Bioware be producing paid dlc in the style of Lair of the Shadow Broker or Leviathan, which piques my interest, over dlc in the style of Bringing Down the Sky or Omega which are clearly irrelevant in the grander scheme of things.
The difference here is that ME2 can stand alone just fine. LOTSB and Arrival are extra content... Leviathan actually explains who and how the Catalyst, prime antagonist of the entire trilogy was created. When the antagonist is introduced in the last ten minutes and throws more curveballs than the World Series, having this piece of information is key.
As for Citadel, this was a chance to say goodbye to the characters fans had grown to love over the series. To get a feeling for where they wound up in the crazy galaxy and get one last chance to stand by some of them as not only squadmates, but as friends. If you ask me, that should have been a goal of ME3 from the get go. Heck, the entire "rec room" on the Normandy for ME3 practically BEGGED even a mini-version of Citadel happening. And so I can definitely understand people complaining that it's what they wanted the original ME3 experience to be like (and, hence, that it should have been included in the base game).
I don't have a problem with DLC that is "good" or "ties into the main story" but it only works when players are satisfied with the base game. Otherwise, it just seems like you are trying to piecemeal out and charge for what fans had been expecting in the first place.