Hello,
How I understand things in Eagle, power net management is a mess.
Because power/supply net name is dictated by device definition in libs, multi power domain application is very boring because you should modify all power/supply pins definitions in libs for each application.
All power/supply type net type management should be revamped to easily allow multi power domain application and decouple lib device definition from schematic use.
But perhaps I miss something.
Emmanuel.