Diffuse Lamellar Keratitis (DLK)
is an inflammation at the plane of the Lasik flap that causes hazing. Its treatment is normally aggressive use of steroids, as you noted. If treatment is delayed, scaring of the cornea can occur and the cornea can digest itself, called "flap melt". This would normally make a person hyperopic (farsighted, longsighted).
Yours is a more unusual case where you are more myopic (nearsighted, shortsighted) after DLK. This would appear to be from inflammation; however your surgeon reports that your corneas are thinner. I am assuming that means thinner due to the DLK. It would appear that the DLK caused your corneas to reshape enough to induce the myopia, not inflammation or thickening.
What you can do depends greatly on the exact condition of your corneas. They very likely have irregular topography. This would cause blurring and multiple images, which I assume you have and is worse at night when you do not use Pilocarpine or Alphagan P to shrink your pupils. You may want to discuss with your doctor using rigid gas permeable (RGP) contact lenses to help smooth the surface. There is also a technique called CLAPIKS that possibly would provide some improvement.
It is likely that the doctor will want all irregularities to resolve as much as possible before recommending any treatment. The doctor may recommend Phototherapeutic Keratectomy (PTK) to smooth the cornea's surface, and then follow with additional laser surgery. It may be that your corneas will become regular enough that PTK is unnecessary.
There is not much you can do but keep your eyes healthy and lubricated (only preservative-free artificial tears) and wait. The eyes do an amazing job of healing if given enough time. I know of one patient who in the late 1990s had DLK with delayed treatment and had significant scaring. Her corneas are now clear.