Any other suggestions for 180s or tweaking the plan are appreciated.
NO relationship talk, no D talk... like you mentioned...
Be a good listener, be supporitive and positive. If he says anything mean, or brings up D stuff just change the subject or say you forgot but you need to run and do.... (fill in the blank). Smile a lot! No criticism.
What were you like when your H met you? What initially attracted him to you? How are you different now? What do you suspect attracted him to OW?
There is no arriving, ever. It is all a continual becoming.