So I spoke to the foreman and the reasoning for elevation is primarily due to the flooding during our typical rainy season. when it pours here in Tampa it really pours.
I am not in a flood zone but I can see the puddle of dirty water that may occur in and around that area if so. Aesthically I am not pleased with the look though. If i do face it with travertine-Im sure it will be more pleasing. I am confident if I decide to, they will remove the cinderblocks and just lay the pre-fab slabs on the dirt. If so the plumber will have to reset some pipes for sure... I asked if the footers are being done next week why not just pour a 3x6 slab? In either case, the decision will be mine. Robl45 makes a good point, what if in time the heatpro weight cause the slab elevated to crack, it does weight 250 lbs.