I wonder if WAS really hear the kids at all when they bring up things like your D did--I tend to think not, by and large. Selective hearing.
Your L sounded very good, and you got the info you needed. Glad you waited on the house decision, and the locks. My L actually steered me away from mediation, because if it comes to a stalemate, Ls from both sides need to be "released" and you have to start all over again--more $$. Mine also encouraged me to file first, file now, but I am still holding that option waaaay in the wings. Got the paperwork, though, and am still plugging away at the financials.
I was glad to hear about the custody / nights per year thing--I will have to check that with my state, too.