One problem is that they can't let Jimmy/Sail/Gene ride off into the sunset as a hero. He operated too deeply on the wrong side of the law for too long.
While it didn't show her as the dynamic character that she was for nearly the entirety of the series, Kim's situation is very fitting, especially for closure of her character arc without contradicting BB. She self imposed an exile, in a very pedestrian, insane existence, as basically penance for her misdeeds and the specific role they played in Howard's death and character assassination.
The call from Jimmy made her realize that she needed to do more (set the record straight on what happened to Howard). She is a shell of what she was earlier in the series mostly due to her belief that after what she's done she doesn't deserve to be any more than a shell of what she once was.
The biggest let down of the past two episodes was the lack of Mike. He was such a great character but his resolution is already known through BB. I imagine that there will be one more great scene with him and Gus (possibly piecing together the initial nexus of Walt/Saul/Gus/Mike).
While I don't know how they can close this up with something similar to the compound at the end of BB, I imagine the writers have something in store that is a lot more climactic than the past two episodes.