Getting new visa is not easy. There is another case where the person had a valid visa stamp from old employer but decided to go for visa stamping after changing the employer. He was issued 221g w/ a laundry list of documents. He is now cursing the day he decided to appear for stamping knowing that he could have returned on the old visa stamp (even his employer/attorney suggested to use the old stamp). So he is the one suffering now, just like the poster here.
The consulates have been using the visa stamping as pretext to show who has the hammer. There is no set processing time, multiple interpretations of the same rule etc. This is another example of a blatant use of power.
My problem w/ your original post (which caused me to write those 2 posts) was use of words like “It was a mistake on yr part” and “This was bound to happen.”. There is no law that one needs to get visa stamped when changing employer. So blaming it on the applicant who followed what the law is, is not a good idea. Rather, it is time the US consulate officers get trained on how to read the law. If you are in a position where you meet them face-to-face, then may be you can point them to the official document and ask them for clarification.