Hi Morgana,
Thanks for the FDK!
As for the jumping back and forth, I would hope that a syatem would be developed that would work.
As to Lucy, I think her reaction was understandable considering the family history in this universe. Their parents had split and Ellen was a booser. Lois had practically raised Lucy and when Lois went missing it was like losing her second mother. Emotionally she crashed
How would you feel if after five years someone that important to your life suddenly returned?
That is how she feels.