In regards to the turrets, what first came to mind for me when I heard them talked about was something similar to Geomancer from ffxi. I sort of envision stationary turrets that get placed via a targeting circle, and continue to function until they either run out of hp, or are recalled. Of course, there will be a degree of control as, that's just the kind of game this is, and I imagine they will be controlled about the same as any other pet. This is of course, all speculation, but then, that's all this thread is anyway.