A very busy procedural route makes all the difference! Maybe ASAS In Trail Procedure (ITP) may help in the future, controllers and pilots manuals are being developed ADS-B in non radar airspace. If you are interested I can supply a lot of info on this. You will ber able to do non radar climbs "remain 8nm behind xxy ahead". I think its got a future but there are some issues regarding a loss of satellite info and reverting to procedural control.
