There is no law that requires you to send anything to USCIS, but you are welcome to do so if you want.

Correct, the L2 does not require an EAD to be permitted to work. And correct, CBP just started annotating I-94's to reflect that fact.

The I-212 form is a waiver for the deportation. But that 10 year bar has ended. If there is a CIMT, you will need an i-601 waiver.

Yes you can apply for an H4 in India, even if you were not granted an H4 change of status or extension of status first in the U.S.

No. And even if he could, a person normally should not come to the U.S. intending to change to another visa status. Instead, just get an H4 and...

Perhaps. if he filed to change to F2 status and is approved, he can stay.

If one has been in H1b status in the last six years, one is not subject to the numerical limitation. If one has never been in the U.S. in H1b...

If they are paying you the prevailing wage, they can sponsor you.

It's the base salary. The employer must also provide the same benefits provided to U.S. workers.

First you should determine whether the Department of State actually transferred your case to Pakistan. If they did, follow up with the U.S....