Keep
Wall trace, Sony Center roof, one skyline view, one quiet look back at the empty-space history.
Do the compact layer walk
Start with the Wall trace, then use the modern skyline as the contrast. Do not spend the whole stop inside the mall.
Read the square in layers
The useful tourist move is not to chase every shop. Move through the layers in order.
Skip
Do not turn this into a normal mall stop unless weather or energy makes that the right call.
Pair it with
Brandenburg Gate, Holocaust Memorial, Topography of Terror or Checkpoint Charlie.