Agreed on a couple of points:

1) The seat maps are more or less blocking out seats so they don't oversell F (or Y) as they start the conversion process. For a period of time, there will be a mixed fleet of 12 & 16 F A319s. The conversion can easily be done overnight, but will probably take 6-8 weeks to complete.

2) To do a quick conversion, they will likely rip out Row 4 F seats, move up Row 5 seats to behind Row 3 (make that now Row 4), and add in a new row of Y seats as the new Row 5, effectively giving them a new row of Y behind F now without impacting anything from the exit row back.

3) Hopefully this means they will deploy the A319 on elite-light routes, like DTW-PBI/FLL/TPA, LGA-PBI/FLL/MCO, etc. Right now they are using them for a decent amount of Florida/Southeast - LGA/BDL/BOS flying. Not super elite-heavy, or elite-premium routes.

I sure won't appreciate less F seats on my weekly DFW-DTW flight, when there are at least 50+ elites on the A319. Plat on H fares isn't even good enough to upgraded as it is.