They tried to be too much like Battlestar Galactica, what with all the scheming and interpersonal conflicts going on left and right. Wrote themselves into a lot of weird dead ends. Lacked clear direction. Way too big of a cast and most of the characters were bland or cringey.

Also at this point of the franchise, they'd already delved through just about everything in the Milky Way Galaxy and Pegasus Galaxy. I don't know if there was much fun they could've had exploring the Ori or Asgard galaxy (forgot the names), since the Ori one is basically... more of the usual "primitive medieval peasants who aren't totally primitive" and with how the Asgard subplot played out... hmm.

Actually, they COULD have played off of that unfinished business with the more "grey" Asgard remnants encountered in Atlantis. That actually could've been a very different and new kind of threat. Since the fuckers are purely about science and reasoning (where-as most of the previous villains had been simply power hungry and posed as powerful gods, or were literally hungry)

They tried to be too much like Battlestar Galactica, what with all the scheming and interpersonal conflicts going on left and right. Wrote themselves into a lot of weird dead ends. Lacked clear direction. Way too big of a cast and most of the characters were bland or cringey.