The great thing is it can stand alone— if they ended there it would still work, simply tying into the 1939 story. I think the second part has great potential to outperform the first after everyone has seen this for a year.
I loved the way the song from the finale kept playing under the opening song, hinting at what’s to come, and Arianna’s acting in that scene was so spot on when you know what’s coming, or actually what’s happened since the opening scene happens after the finale chronologically.