You have to hand it to the developers of these two projects for looking at infill sites close to downtown and for actually putting something behind the "town" in the Town Center concept with residential over retail. I agree that any mention of BRT in these proposals would be more of a liability than an asset - developers are aware that their market demography thinks of buses in the same category as dental visits, taxes, and waiting in line at the DMV.
As for the skyway extension, why the heck not! The only thing that made the skyway a boondoggle (besides the construction rip-off factor) was that it goes nowhere! An extension to an actual destination could be just the thing that is needed to get ridership up. Skyways are a great concept for urban-core transportation because they don't require large footprints that interfere with existing corridors. I had hoped for the same thing along the Brooklyn development corridor but apparently most people in JAX think of the skyway as a bedpan that is better ignored rather than a transportation strategy that could actually work.