in my mind, there lives an off-screen plotline after Love God that follows Mabel as Robbie's "romance coach." (Robbie learns to Be Himself and/or that it's okay to not quite know who "himself" is Yet.)
Incoming Reverse Pines! headcanon:
I think Reverse! Robbie would be a humble, impeccably clean, kind-natured mama’s boy that plays the viola and wears dress shirts and vests a lot. He works at the Mystery Shack because he has a secret fascination with paranormal/supernatural things. He is a diligent worker, and takes orders quite well. While he is well-read and fairly intelligent, he is surprisingly naive, especially evident the few times he actually tries to interact with other human beings (which he tends to avoid outside of work, if he can help it).
Pacifica absolutely adores him, and tries to spend as much time near him as humanly possible. This constant attention, of course, makes him rather uneasy.
from what I read somewhere- “is it just me or was robbie less of a dick as usual in the summerween episode” ….