One, Claire came back, no memory ok, but definetly plot there.
Two, Ethan died, bad guy gone, Total plot there.
Three, Charlie killed a guy! That isn't something you take lightly, Charlie will definetly angst, and other people might be worried/afraid of him.
I also understand why he did it, I mean besides the Claire issue, Ethan KILLED him. He was dead for several minutes. Dead!
So that's my thoughts.