Yes to all of what you said. Although I think I am even more optimistic than you are about the resolution that the brothers have arrived at--that was their lowest point, imho, and they resolved it through "the power of love" (shut up, they so did), and have finally, truly understood each other and reached the point where they can not only talk about and try to give mature trust to each other, but they can give it in extreme circumstances. I'm not sure I could ever be as loving/trusting as Sam was to Dean in this episode--and that was what Dean needed.

I cried. It was amazing.

I can't wait to see how this plays into the final resolution of the whole arc.