Am not fussed about Bonnie Anderson leaving… I personally think that her storylines have run its course of late.
As for Finn “returning”… Well, i am just over this storyline. If they wanted Susan to visualise Finn, and they forgot to film it a year ago (or have any footage of “what happend…”), then tough luck! lol. Filming new scenes for the sake of adding a scene here and there is silly.