SMP,
Its easier than it sounds. The new retracts mount to the main frame using an adaptor plate that acts as a small spacer creating room for wires, etc and keeping them isolated from the gimbal quick release. The new quick release iso for the gimbal mounts directly to the main frame, separate and isolated from the retracts. This allows you to break down the bird to a much more manageable size than in the past, at least the lower portion.
So now, the main part of the retracts stay mounted to your frame, with the legs coming off only leaving the small tabs behind. The new gimbal isolation allows you to remove the gimbal as well, again only leaving a small part behind on the main frame. Remember they are separate from each other.
Assuming you do have the new retracts, you have the option of using a 360 head of any flavor, just make sure the retracts are long enough to accommodate it. Mine, the longest they have currently, had to be extended to allow room for the Photoship One 3X Pro gimbal. There are rumors DW might release a set of legs longer to satisfy those of us with the need for more room. I also now mount the dual batts on plates that are attached to the booms.
My old rig had the Photo Higher retracts/dual batt mounts, as well as the 3X Pro gimbal all being supported by the DW quick release iso mount. Made for a large lower half of the bird and put all the weight of the lower half on the rubber iso mounts. It also required a large case to pack and transport. Its much nicer now. Hope that paints a somewhat clearer picture for you.
-Josh