Are we sure?
That it's Olympia? I'm stretching here but I could imagine the conversation Olympia was having about Shae was Shae saying "she made the first move" with Olympia's husband in doing something shady with the Wellbrexa case like hiding a document....like I said, I am STRETCHING here because I don't WANT it to be Olympia.
Maddie is so hurt that it is Olympia by losing her only friend in forever, so that would be a good reason to keep Olympia on the show, because they have a connection. I'm not sure the hows or whys yet, but I hope it's not Olympia and faith gets restored in Matty about Olympia. Then something goes down and that's when Olympia asks Maddie to leave with her, and Billy and Sarah to start her own firm. Then it can carry on and be weekly cases.