Review the instructions and contact a US immigration attorney. B2 tourist visas don't have sponsors like an immigrant visa would, so generally,...

Received new RFE for specialty occupation H1B. How bad is this ? Is it common ? What are my chance?

The company's US immigration attorney will have seen this type of RFE before, very boilerplate. Contact that attorney for assistance.

Can I marry and file for adjustment of status?

Yes. Contact a US immigration attorney for assistance and to review potential joint sponsor needs.

Change of status to H4 with Spouses H1 extension is just filed and not approved yet.

Yes. Contact the company's US immigration attorney for assistance.

Contact a US immigration attorney for review.

L1b to h1b while laid off

Contact the company's US immigration attorney for strategy review.

Contact a US immigration attorney to review US immigration filing history and future strategy.

You indicate you have a US immigration attorney who has a paralegal - contact the attorney.

Cross Chargeability from Parents - EB2 green card?

Previously asked and answered - review previous posting.

Would concurrent filing of I-140 & I-485 be possible under the new USCIS directive of an in-person interview after Oct 1 2017?

Yes. The new processing doesn't affect the application process. Contact the company's US immigration attorney.