Well, it was completely unnecessary.
Dissatisfied people: "But where did the crew go after the beam sequence?"
Other people: "The Normandy probably picked them up."
And then, what a surprise, the Normandy picked them up.
DP: "But why was the Normandy so far away?"
OP: "They probably didn't want to stick around in case the Crucible fucked shit up."
And then, what a surprise, there was an organized rendezvous out of the system.
DP: "But what happened to the Normandy after crashing?"
OP: "Well, it's not like there are people on board who are capable of fixing ships. Probably did that and went on their way."
And then, although it wasn't shown exactly how, the ship was able to, and did, go on its way.
DP: "But what happened to all the other races like the krogan who I saved form the genophage?"
OP: "Probably rebuilt and made babies or whatever."
And then, what a surprise, they rebuilt and made babies or whatever.
DP: "But if the mass relays explode, wouldn't they destroy the systems they're in?"
OP: "They don't explode. Nothing affected by the space magic was ever shown exploding. In fact the Reapers themselves were shown basically being EMPed."
And then, what a surprise, the relays didn't explode.
DP: "But what happens to galactic civilization with the relays destroyed?"
OP: "Probably fucking rebuilt."
And then, what a surprise, they rebuilt.
And yes, every one of those is something that I've heard and seen answered before today.
Apparently no one can believe anything anymore unless it's given directly to them.