ACR X ON VISUAL APCH TO RWY 18L SAW ACR Y ON VISUAL APCH TO RWY 18R OVERSHOOT HIS TURN ON TO FINAL AND AT THE SAME TIME RECEIVED A TCASII RA TO CLB. ACFT PASSED WITH APPROX 500 FT VERT SEPARATION. ACR X WAS UNHAPPY WITH APCH CTLR VECTOR TECHNIQUE AND FEELS THERE WAS TOO MUCH TFC BEING JAMMED INTO TOO LITTLE AIRSPACE.

Narrative

WE WERE ON APCH TO CVG FROM THE NE. APCH CTL WAS VECTORING US TO FINAL FOR RWY 18L. WE WERE ON A 240 DEG HDG AND CLRED TO DSND FROM 5000 FT TO 3500 FT. SPD WAS SLOWING FROM 210 KIAS TO 180 KIAS AS DIRECTED BY APCH CTL. AT 12 O'CLOCK WE SAW AN ACFT LNDG LIGHT THAT WAS OBVIOUSLY HDG TOWARD US. IT WAS AN ACFT ON A R BASE FOR RWY 18R. HE ALSO SHOWED ON TCASII. WE WERE WATCHING THAT ACFT WHEN HE BEGAN HIS TURN TO RWY 18R FINAL. ABOUT THIS TIME APCH CTL ASKED US IF WE HAD THE ARPT IN SIGHT. WE REPLIED THAT WE DID AND WE WERE CLRED FOR THE VISUAL APCH TO RWY 18L. WE BEGAN OUR TURN TO RWY 18L FINAL; STILL WATCHING THE OTHER ACFT TURNING TO RWY 18R FINAL. OUR CTLR WAS LATE IN RELEASING US FOR THE VISUAL. IN ADDITION THE OTHER ACFT OVERSHOT RWY 18R FINAL. WE GOT AN RA ON OUR TCASII DIRECTING US TO CLB; WHICH WE DID. THE OTHER ACFT ENDED UP UNDERNEATH US; APPROX 500 FT AT THE CLOSEST POINT. WE BOTH CORRECTED BACK TO COURSE. WE ASKED OUR CTLR WHY HE HAD VECTORED US DIRECTLY AT ANOTHER ACFT. HE STATED THAT HE THOUGHT HE HAD GIVEN US AN ADDITIONAL TURN TO FINAL TO SHALLOW OUT THE INTERCEPT ANGLE TO RWY 18L FINAL (HE HAD NOT -- HE WAS VERY BUSY). CLRLY HE MISSED A VECTOR HDG. IN HINDSIGHT I WISH THAT I HAD QUESTIONED THE SIT SOONER. WE PROBABLY LET OUR GUARD DOWN A LITTLE WHEN WE SAW THE OTHER ACFT BEGIN HIS TURN TO FINAL. FINALLY; I THINK IT WAS A CASE OF TRYING TO JAM TOO MANY ACFT INTO TOO LITTLE AIRSPACE.