From the playtest yesterday, it seemed like the entire area from A to Blu spawn was just a deathmatch zone with little room for Blu to move around in. The low ground flank isn't very useful for any class except Spy because defenders on the roof have pretty much perfect visibility of the entire thing. I'd recommend making more of a divide between A and Blu spawn (or making more distance between them), and maybe adding rocks or something to the ledge overlooking the low ground to hide/protect players using it.