Leave aside the pop-psychobabble about "breaking the cycle" and "today is the first day of the rest of your life" (actually said, and delivered in an amazingly irony-free line reading).
Leave aside the decision by almost 40,000 people to settle a new planet without the use of technology — no farming equipment, no building equipment, no medical equipment (presumably nobody in the fleet was diabetic), not even facilities to build a new pair of eyeglasses if one breaks.
Leave aside the willingness by the same 40,000 people to abandon their culture — their poetry, their art, their religion, their identity as a people.
Leave aside the massive geological and genetic impossibilities.
Leave aside, even, the fact that the show tied up long-running mysteries by revealing that a) many of them were caused by angels, one of whom was b) a major character in the show all along.
Leave all that aside. Because that episode lost me when I realised ...
... it was ripping off the ending of The Restaurant at the End of the Universe.