Arkitekt wrote...
Thing is, this isn't a problem until the nitpickers arrive and start making questions about any single lack of exposure they can find in the plot. It's implied that there must have happened a sequence of events that made it possible. The next sequence after the fall acknowledges the accident and shows what happened because of it.
This should be more than enough. To have someone technobabble on how he "survived" just so some people who can't have any lack of exposition can sleep better at night was completely unnecessary (and would have wrecked the scene, unless the explanation occurred for instance in an unforced dialogue with Miranda).
It's a problem because Shepard's ressurection is, to the vast majority of the galaxy an impossibility. And the only answer we get to how this impossibility is in fact possible is "stuff happens" and "it was really expensive"
Yeah, doing the impossible is expensive. Let me tell you, the bill on my Green Lantern power ring is rough on the ol' credit card too

He was put together by the most expensive medical procedure to date. That's all we need to know to enjoy the story. It is likely we get a more explained story in ME3 though, since the noise to get this irrelevant package of information is so loud.
Umm, that's not all we need to know. "It was really expensive" could explain building a new Normandy (okay that and swiping the plans for it)
"It was really expensive" could explain more mundane cybernetics.
"It was really expensive" could explain bringing a couple of high end mercenaries on board like Zaeed and Kasumi
It was really expensive works for making the difficult happen. Or the unlikely. To make the impossible happen, you need more. You need a process. A discovery, an X-factor that says "this is no longer possible. Now it's just difficult. Or unlikely"