This is a very odd episode of Parenthood because the overall arcs are wonderful, and some scenes are very emotionally moving. Yet, there are lots of odd details that don't quite add up when looked at too closely. The most logical conclusion that can be drawn, from an overall truly delightful series, is that the finale is rushed, and should have been given another hour to play out.
One last note: the exterior of the hospital featured in the show Scrubs is extremely recognizable, no matter how different series have lately tried to redress it, as Parenthood does this week. It's time to retire that particular location, as it will always invoke Scrubs for a lot of people, and takes viewers out of the moment when it is tried to be passed off as something else.
Parenthood has not yet been renewed, but its season finale ratings were great, and it's very likely it will be picked up soon for another season on NBC.