I think if you manually raise and lower the car with the SLS valve lever after disconnecting the link, you can get a good fluid flush. This process fills and empties the struts and gets fluid moving through the system.You've done about as complete a job as possible. Your method of changing the fluid worked very well for all the fluid between reservoir, pump and the control valve in the rear suspension. All the fluid in the accumulators, struts, and the lines between them can only be changed by removing and draining all those components, which is not very realistic.
I disagree with the contention that the system is self bleeding for the reason in my first paragraph. I prefer to bleed any air in the system by loosening the hose connection at the top of each rear strut. Let all the foamy fluid out until nothing by pure fluid is draining, then tighten back up and check your reservoir after running the engine for a few minutes to re-pressurize the system.
The bleed valve on the control valve is really only useful for relieving the system pressure prior to working on the system, and for draining some of the fluid out. This bleed valve will not get all the fluid out of the struts and accumulators, but you can get a good bit out.