It just doesn't make sense relying on 1000' separation over TD when there is so much empty airspace. All it takes is one altitude bust and you have an incident, or even worst.
I think they should be 9000'/7000' for DEP and FL110 for ARR over TD. There would be almost 2000' between 2 A/Cs. Nothing ATC can do if it is a PILOT ERROR.
