Well, I've stayed clear of the thread until now. I just finished watching the last episode (Watched all seasons over the course of this week), and I really, really enjoyed it, with the exception that I think it should've really been spread across two or even three episodes. There were just so many different things that needed to be done at a ridiculous speed to cram it all into one continous episode - which explains the sudden apperance of wierd new propulsion systems. Not even a three-ZPM powered Atlantis or any of the Daedalus-class ships can pull off anything as ridiculous as what the ZPM-powered Hive Ship did.
Overall, I really enjoyed all of Season 5 a lot more than most of the other seasons and even though I've never really been -that- huge of a SGA-fan, I'm really, really sorry to see the show go. I'm also sorry that they still haven't ditched the dead weight that is Teyla, someone I've been hoping they'd kill off for the past 5 seasons.
[...]
They really should've dumped the Wraith and stuck with the stranded Asgard. It was the best plot hook they've had for several seasons, and they wasted it in a single two-parter.
I -kinda- agree with you there. I was expecting a lot more out of the Lost Tribe, and I'm sure that had the show continued, we would've seen a lot more of them. I think it'd be a mistake to just "wrap up the Wraith" though. In a series, I'd have to say that you'd have to do it progressively - something they'll obviously not have the chance to do now.

Edit: Hey, found a petition. Almost 33k signatures, not bad. Not bad at all.
http://www.petitionspot.com/petitions/SaveSGA/