I work with TCAS every day. It is agreat tool for vertical speration but is !!!!e at lateral.
You may feel that you have an additional level of comfort but in real life you are just in the same situation as you were with out it. Until you can see it you arn't seperated.
Your RT call saying you have it is meaningless and clutters up the RT.
The only way you can assure seperation is by getting a level seperation.
I suggest you read up a bit more on the limitations of TCAS and what its actually designed to do. It is not an airborne radar type display.