What feels like it's missing from the scene? I have to admit, this is one of my very favorite scenes in the entire series, one of those, "Yes, Brian really does love Justin" scenes. And I also love that it doesn't WORK... Justin is still planning to go to Dartmouth, and it's his own artistic gift that changes his mind, not what Brian or Debbie say to him, although I'm sure they prepared the ground.
I love that paradigm of the concerned Brian breaking his own "rule" about giving advice and showing he cares, and Justin still being his own person and finding his own way, despite how much he loves Brian.