I'll post here rather than at radioreference. MIA runs a split final. The Tracon runs 133.05/ 125.75 in conjunction with each other on all flows. 133.77 is a Feeder/ Final for FLL. In fact it's the absolute main sector at FLL and runs both the approaches to 9L and 27R. 125.75 does indeed still exist, it operates one of the Final Vectors as I mentioned above. DVALL, FOWEE is handled by South Arrival 120.5. ANNEY, CYY are handled by North Arrival 124.85. BLUFI is handled by 133.77, only because it's a Turboprop only arrival, therefore the aircraft are taken down low into that FLL Arrival sector rather than keeping them up high with the turbojet arrivals down the beach into MIA. As far as the DEKAL, I think it's feed by 119.45 MIA North Departure and then when the aircraft are brought down under the MIA Arrival corridor that goes along the beach. Then they are handed off to 133.77 for final vectors.
EJ