It is one of my favorite subplots. I liked seeing Toby away from JT and it was hilarious to see him troll Terri. And writers even brought back a fact from previous seasons; Terri thinks she is psychic and into tarot cards, etc. I think Toby even said he heard it from Ashley. All that is believable and not random at all.
I love how he says "Therese" like "Clarice" from Silence with the Lambs. I don't know if the younger cast or audience got it but I fully appreciate it.