I recently bought your expansion and played the Neuschwanstein Job yesterday with a group of three players. It was my first session of Eat the Reich, and went very well for it.
I struggled a bit with the balancing at times. On the one hand, I only had 3 players. On the other hand, I overlooked some information in the mass of text during the game. It could be a bit more concise for my taste.
The elevator shaft was very hard for the group. I also found it a little difficult narratively to make the danger make sense. If the characters stay in the lift, close combat is difficult. If they manage to climb to the top, it's difficult to explain what the objective is (still is) So all that's really left is to shoot constantly, climb the wall from time to time, but not make it to the top too soon.
But Götterdämmerung, since I had reduced her to T6 after the lift, was actually dead after one attack.
I had the Blood Valkyrie at the end lick up the blood of an injured vampire, which turned her from a white angel to a sort of black one, and there was another round of combat. In the end, she was taken from the sky while she was a black angel, summoning lightning from the storm and pelting the castle.
In hindsight, a shorter written form would be easier for me to direct. One line of description per scene, with the threats and their values directly underneath, so that you could quickly use this in a window for sharing in Discord.
Maybe threat and attack values as a table would be handy to scale it a bit for 3, 4, 5 players.
Write any more and I'll give you my money!