Yeah, SG1 started to flag somewhat when they moved to the Ori storyline after the defeat of the Goa’uld.

Crusade bombed because the network aired the episodes completely out of order, much the same way they did with Firefly, except with noticeable continuity errors. Turned it into an absolute mess. I read an article by JMS about what was supposed to happen with the series and it sounded great, but they never really got given the chance.

B5 is being rebooted by CW apparently.