Hi FNG
Nice explanation. Although the overhead bring aircraft together, you at least know where they are going to be so you can look out for them. Then use a bit of brain to sort out you own sequence (folow the CAP

)It only goes pear shaped when people join direct in an overhead pattern.
As for VHF, I think common sense is the byword. I am a great fan of AG. Just try Booker (full ATC) and Waltham AG and see where you prefer to fly out of. OK I do take into consideration the gliding site at Booker adds complications.
Safe flying to all
Wide