I know this sucks that we won't be able to tune these openly for a while. But at least there's certain options that will be available soon (like Roush?) and probably even with a warranty!
I don't plan to modify my DH at all until the warranty is up, other than maybe some exhaust tweaks (not sure what's possible with Active Exhaust), tint, wheels/tires.
I'm going to stick with my initial assessment. Ford Performance wants to keep all the tuning ability and the aftermarket support within Ford and its partners.