HEADING DEVIATION; LESS THAN STANDARD SEPARATION; AIRBORNE CONFLICT; DELAYED FREQ CHANGE.

Narrative

WHILE ON DOWNWIND WE RECEIVED A CLRNC INCLUDING A TURN; DSCNT AND INSTRUCTIONS TO LOOK FOR TFC. WE WERE ALSO GIVEN A FREQ CHANGE BUT WERE NOT CLRED FOR A VISUAL APCH. DUE TO THE COMPLEXITY OF THE CLRNC THERE WAS A BIT OF A DELAY BEFORE THE FREQ CHANGE WAS ACCOMPLISHED. THE VECTOR PUT US ON THE RWY 35R EXTENDED CENTERLINE BY THE TIME THE NEW CTLR WAS CONTACTED. THE NEW CTLR VECTORED US OUT OF OUR TFC SEQUENCE AND RESEQUENCED US TO RWY 36L. APPARENTLY THIS WAS DUE TO A TFC CONFLICT; POSSIBLY ARISING OUT OF THE DELAYED FREQ CHANGE. THE PROB WAS THE BULK OF INFO GIVEN IN THE CLRNC AT A POINT SO CLOSE TO THE FINAL APCH AREA. ALSO THE CLRNC DID NOT INCLUDE CLRNC FOR THE VISUAL APCH. THIS NECESSITATED FOLLOWING A VECTOR (BASE LEG) THAT IN LESS THAN A MINUTE MUST BE CHANGED. THIS IS A SET UP FOR A CONFLICT SITUATION IF EVEN THE SLIGHTEST COM HITCH ARISES. THE PROB COULD BE RESOLVED BY GIVING FREQ CHANGES WHILE ON EITHER DOWNWIND OR FINAL OR AFTER CLRNC FOR THE VISUAL APCH. DON'T; HOWEVER; GIVE THE FREQ CHANGE WHILE ON A TIGHT BASE LEG HDG ASSIGNMENT.