Also, Marley (any chance his first name is Jacob?) has a clear change from being too afraid to call his son to clearly having gotten over it. This doesn’t mean that Kevin doesn’t also change, but does help add to the cumulative argument against it.
The question that brings up for me is how does the mother change? Since we saw Marley change do we also need to see mom change? Does this lack of change end up relegating her to an OS role after Marley changes? Or OS and RS?
(Edit: I sidetracked myself. My original point was going to be that, in convincing Marley to change, it seems Kevin maybe convinced himself to grow out of his attitude toward his own family)