Unclear how much longer processing will be. Contact USCIS for guidance.

An individual should not receive another GC after already being a PR.

No you can update your information at time of interview.

Yes the mailing address can be indicated.

This does not need to be answered in the affirmative.

You may update the address at the NVC phase.

Yes you will be required to submit a final divorce decree.

No the spouse may chose to withdraw.

No the physical GC should suffice for reentry.

No not unless it was revoked by USCIS.