I really like the new maps, they are way better than the ones in the AP, but the thing is there is way too many walls in each map, so with 4 players it brings down the performance.
I had to redraw the walls in the maps to make it work better, this unfortunately creates work for the GM. I have a i7 7700 and a rtx 2600 for reference.
The 8th floor for instance has 900 walls, which is completely crazy, foundry really slows down once you reach 600 walls.