AN OBSERVER RIDING JUMP SEAT IN THE B757 COMMENTED THAT PROCS THAT REQUIRE ACFT TO CONSISTENTLY INTERCEPT THE GS FROM ABOVE; ESPECIALLY WHEN WX IS AT MINIMUMS; ARE UNSAFE.

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ON OCT/XX/96 I OBSERVED THE ARR INTO DFW FROM THE JUMPSEAT OF B757. STAR ALTS WERE NOT APPLICABLE BECAUSE OF OUR ARR INTO THE AREA AT FL200 DUE TO HIGH ALT TURB. AT COVIE WE WERE VECTORED OFF THE STAR FOR THE ILS RWY 17C. WX AT TIME OF APCH WAS 200 FT AND 1/2 MI VISIBILITY. OUR ACFT WAS HELD HIGH; 6000 FT AT 16 DME; AND CLRED FOR PROC FROM FULL SCALE DEFLECTION HIGH. AFTER MAX PERFORMANCE DSCNT; WE INTERCEPTED THE GS AT APPROX 1000 FT AGL. DURING THE TIME OF OUR VECTORS; I HEARD NO LESS THAN 3 ACFT CALL FOR MISSED APCH BECAUSE THEY WERE TOO HIGH TO DSND. ALL 3 OF THESE ACFT WERE BEING VECTORED FOR RWY 17L. IN 2 CASES THE ARR CTLR STATED; I HAVE NO PLACE TO TURN YOU; CONTINUE APCH; CONTACT TWR AND TELL THEM YOU ARE GOING MISSED. THE THIRD ACFT WAS BROKEN OUT TO THE W TO ALLOW A DSCNT TO RWY 18R. ON MORE THAN 1 OCCASION; I HEARD THE CTLR STATE THAT THERE WAS NO ROOM TO MANEUVER ACFT FOR DSCNT UNDER THE NEW PROCS. IN MY OPINION; PROCS THAT REQUIRE ACFT TO CONSISTENTLY INTERCEPT THE GS FROM ABOVE -- ESPECIALLY WHEN WX IS AT MINIMUMS -- ARE UNSAFE.