I went through all of the stages of grief - including anger - after SGU's cancellation was announced, but after watching this episode... wow.
While the first season (especially the first half) was less-than-amazing, the current (awesome) dynamics on the ship would not have been possible without that build-up.
Young's "including you and me?" line wouldn't have packed nearly as much of a punch if it weren't for the build-up. Nor would Greer immediately volunteering to stay with Rush and Young, Rush telling Chloe everyone on the ship is useful/meant to be there (and Chloe truly becoming useful), or any of the other emotional scenes and moments we've had in Season 2.
Even those who prefer an episodic format can't have much to complain about at this point. Twin Destinies was a classic Stargate episode, one of those instant favorites. Not perfect, but it had comedy throughout, awe (coming up on the broken Destiny = epic), several swooshes (gating inside a star, gating leading to time travel, gating to a copy of your own ship to salvage parts, arms held inside gates while team members sprint towards it to a backdrop of explosions), and still had moments of tension and that darker/more mature "feel" that SGU fans love.
This "something for everyone" format is what we could have enjoyed for another three years if more fans (and executives) had been patient. Season 1 was necessary build-up for the awesomeness that we have now. I know the internet forum tendency is to blame "ADD," but I actually have clinically-diagnosed ADHD and it held my attention just fine. So I don't know what's up with folks being impatient nowadays. All I know is that I'm really mad.