I'd love to come down there whenever Overwatch is going.
As for FPS, as long as people follow MED's, 400 fps isn't bad. But as for the lower floor being a little more.. "tight" I suppose, the idea of making it a pistol only (or at least making sure people's guns are shooting ~350 fps for that area) isn't a bad idea. If all else fails you could always try to implement a "Bang-Bang" rule. Just throwin out some constructive advice.