6. The photo of Rákosi in Comrade Virág's room
It's an iconic photo of the Stalinist leader. It was customary to hang a photograph in every room of the great leaders, chiefly Rákosi and Stalin - to watch over us, mere mortals. There are other pictures of the former throughout the film, curiously (or maybe not so curiously) Stalin is missing.
While this particular photo was widely known, featured in textbooks for example, it wasn't for hanging it upon walls, so it is striking to see it in its huge black and white reality at that place in that colorful scene. Maybe also adding to the importance of Comrade Virág, who could have allowed that photo to be displayed in such way.

7. The Great Wise Leader himself is also missing
The highest ranking communist character appearing in person is Comrade Bástya, assuming the avatar of Farkas Mihály, the minister of defence. The Great Wise leader is only mentioned, and participates on one occasion via a phone conversation with Comrade Bástya. We don't hear his voice however. We also don't know what is his name in the film.