B757 FLC COMPLAINT OF APCH CTLR HANDLING OF ARR BY CHANGING THE RWY DEPENDENT ARR RTE 4 TIMES AND THEN ENDING WITH VECTORS TO THE 5TH RWY ASSIGNMENT. THIS CAUSED MANY PROC CHANGES BEFORE OVERSHOOTING THE FIX.

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I WAS THE PF ON MAR/XA/02; FLT XXX; INTO LAS. WE WERE IN CRUISE. WE WERE FILED FOR AND PLANNING ON THE MIROK ARR. THE ATIS HAD INDICATED RWY 25L ARR AND THEN CHANGED TO RWY 1L/R. WE QUERIED THE CTR CTLR. THEY TOLD US TO PLAN ON RWY 25L. THESE ARRS ARE RWY DEPENDENT. WE WERE ASSIGNED A LOWER ALT AND CHANGED TO THE LYNSE ARR RWY 25L. WE WERE THEN CHANGED BACK TO THE MIROK AND TOLD TO DSND VIA THE MIROK. WE WERE JUST A SHORT DISTANCE FROM THE FIRST FIX AFTER PGS AND THEN WE WERE GIVEN THE LYNSE RWY 1R. I WAS PROGRAMMING THIS IN WHILE THE LNAV WAS STARTING ITS TURN TO THE FIX AFTER PGS. THEN WE WERE SWITCHED TO APCH AND THEY GAVE US A TURN TO THE L OVER 100 DEGS TO OUR L; BUT THEN NO ALT INSTRUCTIONS. OUR LAST ALT WAS DSND VIA THE MIROK THEN SWITCHED TO THE LYNSE FOR RWY 1R. IF YOU ARE CONFUSED SO WERE WE. VNAV WAS ENGAGED AND DSNDING VIA THE LYNSE AND AFTER THE TURN FROM APCH THEY FINALLY GAVE US AN ALT TO DSND TO. APCH THEN TOLD US TO PLAN ON RWY 1R AND GAVE US VECTORS FOR THAT RWY AND TOLD US TO INTERCEPT THE 190 DEG RADIAL. AS WE WERE CLOSING ON RWY 1R; WE WERE SWITCHED TO RWY 1L. THIS WHOLE EXPERIENCE WAS CHAOTIC AND CONFUSING. WHAT'S THE POINT OF RWY DEPENDENT ARRS AND DSND VIA CLRNCS IF YOU ARE CHANGED 4 TIMES AND NEVER END UP FLYING ANY OF THEM? WE SPENT WAY TOO MUCH TIME HEADS DOWN IN THE BOX. THE CTLRS SPENT WAY TOO MUCH TIME TALKING AND OVERCTLING. I THINK UNLESS SOMETHING REALLY DRASTIC IS HAPPENING AT THE ARPT; WHEN YOU CHK IN WITH ZLA THEY SHOULD GIVE YOU THE RWY AND ARR PROC AND THEN PRIOR TO YOUR TOP OF DSCNT GIVE YOU THE DSND VIA CLRNC. APCH SHOULD BE ON THE SAME SHEET OF MUSIC AS CTR AND THEN ALL THEY HAVE TO DO IS MONITOR YOUR PROGRESS. IF THIS KEEPS UP IN LAS SOMEBODY IS GOING TO MISS A TURN OR AN ALT AND IT'S GOING TO CAUSE A PROB.