I am not sure whether I like the Weir storyline. I wished she had stayed in command of Atlantis fro; the beginning. Now she comes back as the leader of the replicators looking to ascend (and fail). The only part that I really like about this episode is the fact that she scarified herself to save Atlantis, proving to everybody that she was indeed Elizabeth Weir.
I also wished that we learned more about the other technologically-advanced races (maybe for another episode??) and whether the aliens seen in the previous episode are part of the races whose tech was occupied by the replicators while they were in subspace.
So in all, it's a good episode to wrap up the Weir storyline and show promises for encounters with new races, whether potential allies or enemies.