I believe the best way Amtrak can start this for now, is by:
1. using one Amfleet II/Viewliner long distance consist from NYC, by reinstating the Palmetto back into the Silver Palm (giving us back three overnight trains), then running one of them whole down the FEC route, and another one split at Jacksonville. The third or last one, whichever it is, remains on it's current route as is, except for improved running times and longer consists during peak periods.
2. to fully capture it's potential here, Amtrak must somehow get some Amfleet or Horizon cars for a few INTRAstate runs, say two roundtrips Miami to Jacksonville. Until the new bilevels come, if some are destined to go to Florida, I would ask to evaluate releasing some Amfleet I's by dropping the lowest performing Northeast Regional coach section and replacing it with an Acela, make em' work for their money by getting a 17th trainset in use. That leaves three spares in each of the 3 major terminals left. Somebody in a similar discussion raised the issue of cast-off Atlanctic City ACSES cars (eight exist, right) to contribute to a tight equipment pool, though they would have to run uncombined with other types.
3. I'm asking for it, but many people are, louder than ever: the Sunset Ltd. But don't run it, no, KEEP IT THE HELL OUT OF FLORIDA -- for now. Decide, think, ponder, whether any return of it would be better on the old route, or this more scenic and faster version on FEC rails. Then, BRING IT ON!! But only with smiles and love, of course....