One of my favorite radio calls from ORD approach in the late 1990's - "I don't HAVE TIME for read backs. Just listen up and DO IT!" And then he started giving non stop clearances for several minutes.
that is everything but safe.
Read back is mandatory not optional features.
I do believe that USA ATC system is good ( otherwise they wouldn't have been able to deal with the traffic level ) but others all around world are also good, in their traffic levels and so on.
It will be definitely better for USA to take fresh blood ,from other countries, as well send their people to watch and learn from others. Maybe they see something new,interesting and better practice.
East Germans, also believed that they were best. Until someone broke iron curtain.
any similarity with USA believes and ideas are purely fictitious.
