Camilla was presumably a tool to make a point for mental health week, as has been mentioned.
I don’t think Lilly would mind Russ pairing up with Elizabeth she appears to be going off him, and maybe the new humble Freddy would not object either but I think she deserves better.
Freddy will warm to Russ when they show the pictures in the loft in the art gallery and sell one or all of them for a price that will solve all their money problems.
I wonder if the writers read this thread for ideas, or conversely to change the plot if we quess it in advance and steal their thunder?