I liked, and when I say liked I mean respected or thought was clever not enjoyed, the way they showed that Randall hasn't changed in how he views his Mother, their relationship and his responsibilities. A year after Jack's death Randall is very, very sure that his Mom shouldn't be dating or looking at other men, Kevin is automatically wrong in trying to even introduce Rebecca to another guy and Randall can take care of things no other man needed in his Mom's life. Jump forward about 20 years and - Randall is very, very sure that his Mom should go to the clinical trial he found, Kevin is automatically wrong for even wanting to delay talking about it and Randall can take care of things no need to consult the man currently in his Mom's life even though Randall's solution effectively takes Rebecca away from her actual husband for nearly a year.
Those two scenes made it very clear how Randall see's his role and the lack of respect he has toward others who might have even a small opinion about how his Mother's life should go.
They both landed some low blows in that argument but Kevin was not wrong this time. I wish he had said this to Randall, I wish Randall had thought of it himself but..........Why couldn't Randall have compromised, why did he have to hit her with the big sell right at the party. So she was upset because she couldn't remember the hotel name and he wanted to comfort her - how about "Mom I know you get upset when you have an episode and forget something. In fact I had some ideas about that and Kevin and I wanted to talk to you about it over breakfast. But let's not let it spoil tonight, let's just have fun and enjoy the party. We can talk more in the morning if you want, tonight is about fun and family".
Rebecca did look wonderful in that dress. I do wonder though how late is the museum open that they went to the movie premier after it was dark out, watched the entire movie, spent time at the after party and Rebecca STILL had time to gain admission and see the painting - even accounting for winter's early sunset shouldn't it have been something like 10-11pm by then?