PA28 PLT AND INSTRUCTOR QUESTION SUU APCH CTLR'S SEQUENCING.

Narrative

MY CFII AND I WERE ON A BONA FIDE IFR CLRNC INTO CCR WHEN 2 OTHER ACFT REQUESTED PRACTICE APCHS TO CCR UNDER VFR RULES. THE TRAVIS APCH CTLR KEPT US AT 4000 FT TO WITHIN 4 NM OF THE CCR VOR (WHICH IS THE FAF THAT SHOULD BE CROSSED AT 1000 FT); AT WHICH POINT WE QUESTIONED HIS ACTIONS. HE ISSUED US VECTORS TO THE E TO SET UP AGAIN. BUT SINCE MY CFII HAD BEEN ADAMANT THAT THE APCH BE DONE PROPERLY; THE CTLR'S SUPVR REQUESTED WE CALL HIM. WE DID SO UPON LNDG; AND HE CLAIMED WE HADN'T TURNED ON THE FIRST VECTOR SOON ENOUGH; WHICH IS NOT TRUE. WE TURNED IMMEDIATELY EVEN WHILE 'DISCUSSING' THE SIT ON THE RADIO. HOWEVER; TRAVIS' RADAR SYS; BEING OLD; DOESN'T SHOW THE TURN QUICKLY SO THE CTLR DIDN'T SEE IT RIGHT AWAY. ON THE SECOND APCH; THE CTLR KEPT US TOO HIGH AGAIN; ALLOWING A DSCNT FROM 4000 FT AT 5 NM FROM THE VOR. WE COMPLIED AND ALMOST MADE THE XING; BUT WERE NOT HAPPY ABOUT 'SHOCK-COOLING' THE ENG. THE MAIN SAFETY ISSUE HERE IS THAT THE TRAVIS CTLR ACCEPTED 2 VFR FLTS IN DIRECT OPPOSITION TO OURS; PUTTING US (A TRUE IFR FLT) IN JEOPARDY OF A HEAD-ON COLLISION. INSTEAD; THE CTLR SHOULD HAVE ISSUED VECTORS TO THE VFR'S AND ALLOWED US TO PROPERLY COMPLETE OUR IFR APCH.