How will that cracked slap pass inspection?
If you know anything, these things get inspected, and nothing else gets done if an inspector does not sign off on it,
Also I would fire these morons.
Are you going to stucco the house? Then your house will have a lot of weight on the perimeter of the sections hanging off.
This will allow termites to come along and ruin your fine money spent.
A cracked slap, in this day and age?
Step 1, you're fired
I know lots of houses have these issues with a cracked slab, they are usually 30 years old and have some sort of root damage that caused it. Cracking right off curing is really not a good contractor. When the cement cures fast, without some sort of dampness it cracks, which already made for a weaker slab with the fast cure and cracks.
2x4 are really 1.5 x 3.5
So that inch hanging off is really a concern.
Also those bolts holding the 2x4s down to the slab should of been set better, They are placed then the slab is poured so the are locked in as the slab sets
Seriously, your house is going to look like a beetlejuice set if they cannot get the foundation right