Can i suggest to anyone here who thinks that they would do a better job of controlling that they actually spend time at an ATC unit. Also as to reducing the size of CAS , some of us have to work as close as we safely can to the edges of CAS just to maintain standard separation , it isn't as vast as you may make out.
They work to a different system in the US please do not even attempt to compare the procedures they can be quite different.
Whilst I am happy for aircraft to transit through the overhead I will not restrict the climb of a Jet aircraft when a simple routing east or west of the overhead will keep all people happy.