Important points (imho);
-TCAS is good, but has it's own set of problems
-TCAS is not infallible
-pilots can over-react to alerts, and cause more problems (see point 1).
-controllers need to be aware that they are not fully in control any more, and the pilot's must have every available piece of information in order to keep up SA. ie pass traffic lots, in order to prevent "control" being wrested from you.
-the idea that TCAS can be used as a primary seperation tool, as under NAS class E, is dangerous and irresponsible.