my friend and I were on almost exactly similar track. RD same month,same company, left the company to join different companies the same week, same attorneys, similar AC-21 letter to INS after change of job.
The difference, he got approved last week without even an RFE. I recd. an interview call for next month.
Dont try to make too much sense. I guess it totally depends on the IIO, how comfortable he feels looking at the application.