I don't think there's much you could do to make The Sopranos more interesting, but having Melfi use him to go after her attacker I feel would have introduced a really interesting angle.
also my voice-to-text thinks that Melfi us "milfy", which isn't wrong.
I wanted to see her cross the line and then try to go back. eventually confessing to her therapist what she's done; so long as you're not confessing future harm to someone or yourself, confidentiality applies
or what if it turns out she loves it?
or, what if she did it by accident. gave him slightly too much information, he does his own investigation and finds out what happens and does it himself
"Tony... the man I spoke to you about... he was killed."
"Dont ask Doc. If something happened to him, he had it coming. The how or the why isnt something that will help you. Cause if it wasnt me you might be disappointed in me and if it was I'd never tell you."