I loved this entire episode and really love this show. Your take is spot on. Two amazing actors portraying a scene with such subtlety but also such vibrancy.
You can't help but feel the wave of emotions that John Turturro and Christopher Walkin evoke throughout the show, but especially in this heartbreaking scene (amongst heartbreaking scenes! I mean, Dylan's storyline this episode! OMG!).
I also feel it was such an evocative scene because much of the fan theories around Burt revolved around the possibility he would betray or hurt Irving. They even played the heartstrings a bit on the car ride to the train station, right up until this scene! Ultimately I'm very happy the writers chose not to go down that narrative route.
Glad to see another fan of the show here on Lemmy. Enjoy next week's finale! π