Okay, Spoiler: releasing the energy of the crucible destroys the mass relays, I misunderstood that one initially. That part makes more sense now, sorry on that one. And the reapers do appear to just up and fly away... to somewhere, I missed that also. But still, for as much minute detail as the game went into telling the story and crafting the worlds, this was an oddly vague narrative for the ending. Thanks for the help.