Fix the SWF/WPF airspace issue
Currently, System Windows Forms based controls always draw on top of WPF controls when they overlap, which is undesirable. I suggest that you fully integrate SWF controls into WPF so they appropriately handle the z-order, opacity, zoom, and other WPF properties.
Fully agreed with this suggestion. Airspace issues must be fixed. Besides, they were fixed already in .Net 4.5 alpha, but this feature was removed from framework by unknown reason.