MLG BEING VECTORED FOR COUPLED ILS APCH AND FELT TURNON BY APCH CTL WAS POOR. ACFT DESCENDED BELOW ASSIGNED ALT PRIOR TO BEING ESTABLISHED ON LOCALIZER.

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FINAL APCH CTLR AT DFW GAVE US RADAR VECTOR TO INTERCEPT THE FINAL APCH AT 3000' UNTIL ESTABLISHED ON FINAL. OUR POS AT THE TIME WAS 3 OR 4 MI FROM OM. THIS WAS ISSUED AS OUR APCH CLRNC. THIS VECTOR WAS SUCH THAT WE WOULD INTERCEPT THE G/S BEFORE THE LOC. MEA ON APCH SEGMENT AT THIS POINT IS 2300'; WHEN AUTH BY ATC. ON OUR VECTOR HDG WE WERE HDG DIRECTLY AT OM; WHICH WOULD HAVE MADE US 600' HIGH AT OM. THE AUTOPLT STARTED TO INTERCEPT G/S BEFORE LOC. STARTING DOWN ABOUT 200' THE DSCNT WAS STOPPED AND A BETTER HDG TO INTERCEPT PRIOR WAS MADE TO THE OM. THE APCH WAS COMPLETED WITH NO FURTHER PROBS. I FEEL THE CTLR'S RADAR VECTOR PUT US INTO SUCH A POS AS TO DESTABILIZE THE APCH CLOSE INTO THE ARPT FOR THE PRESENT METEOROLOGICAL CONDITIONS POTENTIALLY CAUSING A HIGH RATE OF DSCNT CLOSE TO THE GND. SUPPLEMENTAL INFO FROM ACN 80581: CTLR GAVE US A HDG TO INTERCEPT FINAL AT 3000'; 3 MI FROM OM CLRED FOR APCH RWY 17L. VECTOR ACTUALLY SENT US DIRECT TO OM. G/S INTERCEPT ALT AT OM IS 2400' MSL. THE ACFT WAS ON AUTOPLT WITH HDG SELECT FOR AUTO APCH. I STOPPED DSCNT AFTER ABOUT 250'; 2750 AGL AND HELD AND TURNED RIGHT 15 DEGS TO INTERCEPT LOC QUICKER. I FEEL WE WERE GIVEN A VECTOR HDG WHICH DID NOT LET US ESTABLISH OURSELVES FAR ENOUGH OUT ON THE APCH SEGMENT FOR A STABILIZED APCH IN THOSE WX CONDITIONS.