So no worry about cracking walls due to hydrostatic pressure? Because the space under the slab and within the foundation wall is filled with dirt and crushed/clean gravel?

I do plan to tear down the old house and rebuild, and since crawlspace and vents are required, I plan to add slab/concrete crawlspace floor to condition the crawlspace (I found despited multiple vents and fans, dehumidifier, etc., it's difficult to improve the crawlspace air and I feel it's difficult to do a good encapsulation job), and close the openable vents. The crawlspace will be at least 4~5 feet tall. The existing house is at least a foot above grade, and the new house will be at least 2 feet above grade, at least around that much above the Base Flood Elevation, too.

And although the existing house (block crawlspace walls, brick above grade, some cracks in bricks) doesn't seem to have footing drainage, I'm leaning toward adding the drainage despite having to pump water from the pipes "uphill" to the ditches (which may not flow away quickly).

Wouldn't a house with crawlspace/basement, that is having an empty cavity between foundation walls, definitely could be affected by hydrostatic pressure of the rising water table during wet season? Thanks.