The bad thing i see in GE's method is an oil leak in your nozzle system that could cause your engine to loose it's lube oil!? (Anyone know of an incident of this type?)
I hear ya over here [Link pending approval] There is a lube drain tube under the turbine shroud that extends into the bypass air. Whenever the engine shuts down, the line vents out oil and gives that wet look, like there's an internal leak. Sometime it is a lot of oil on the bottom, and sometimes therevery little. The bypass air blows that stuff all over the aug liner and make it look worse that what it is. It is normal occurence. As long as your burning in well in your oil consumption range, your good. Our pro super was freaking out while we were TDY because he never seen that happened before. He would not listen to us, so thankfully we had our GE rep with us.
On a different note, on GE's VSVs not being an option. In SEC mode, the IGV's are set closed, but your VSV's are still an option to the engine. Initially, the VSV's are controlled by the DEC via electrical signal to the MEC and right VSV actuator. But in SEC mode, the VSV's are controlled fully by the MEC via VSV rig cable and of course, by the MEC providing the pressure to left side actuator. Something still has to regulate air going into the compressor when you start dumping fuel.