yes im not overly impressed with the fact that they recast her, but like you I think she has a part to play in Sam's story arc & characters development.I liked Katie Cassidy as Ruby very much. I wish she were still playing the part. I can picture her seducing Sam to the darkside much better. Budget cuts forced her off. The only gripe I have with Ruby is the current actress is wrong for the part, IMO.whilst I agree with pretty much all you said about Supernatural, I would say that Ruby hasnt been the total flop that the other female characters were
Clark who, of course, found the miracle 11th hour solution so he wouldn't have to kill Chloe....because he "believed enough," of course. If you're a good enough person, you'll never have to make a horrible choice. 

