Once it is sealed, you will notice mistakes just as much. His standards are low. It may be normal because there are a lot of crap stamped concrete operators.

Some concrete sealer application require 28 days full curing time for best results... Most contractors will wait a minimum of 7 days after the water curing time is done but not recommended.

Some contractors use sealing compound, if that what he is planning to use, that should be applied as soon as possible right after concrete finishing process and that will most likely fill all the voids/cracks.

As uneven edges and consistent impressions go, not much you can do now, not to mention you posted a close-up picture of a few spots... if you can, please post a picture of the entire slab that will tell more about the job.

More pictures