I have once done a K3, but they are rare and hard to get approved since they require the I-130 also to be filed. It could bring your wife to the...

If you do not show up for employment, and you continue for any length of time without changing status, then unlawful presence may start...

You may be eligible for adjustment of status since you were paroled into the U.S. and you seem not to have any unlawful presence.

You can stay while the application is pending. If you applied to school within 90 days of admission, CIS will deem it fraudulent, and so will CBP...

The proper document to provide is the green card since the EAD is no longer valid.

You cannot file the waiver until after the interview.

Follow up with them through customer service.

You could try calling them back. Normally a law enforcement entity will not discuss what they are in the process of investigating.

If your spouse is willing to file with you, then do so. If not, then you can file for a waiver.

Since the processing times are unknown, you can certainly try. You only risk losing the filing fees.