I think I will keep spamming this thread, so not to create a different one for the same case. Good news, yesterday I got a CO. So far nothing was mentioned about the character issue. What the CO wanted to ensure was that I have the work experience I claim to have. The only thing that I had sent was a letter of reference from my employer. Since the letter could always be forged (not that this one was), the case officer requested W-2 forms (these are legal documents given by a company to each employee who was paid wages) for all the years I have been employed by the company which is since 2002. I live now in Bulgaria and the documents are in the US with my mom, so imagine how I felt having to ask her for documents that she has no clue about and which silly me has not kept very organized.
Good news is that the CO agreed to see bank statements too and I managed to get statements from my bank as far back as 2004 which shows direct deposit from the company. Also I requested from the Internal Revenue Service transcripts of all my tax returns filed since 2002. Let's hope that these will be enough - and that I am able to get some W-2s. I spoke with my boss (fortunately I still work for the same company since 2002) and she said that these forms will be extremely inconvenient to get as they are now somewhere in storage. I looked at the Operation Manual and it doesn't mention any specific proof as long as the CO finds all evidence on hand credible enough to satisfy the work experience requirement.
So far nothing about character waiver, interview, partnership questions. I expect these will be next as soon as the main points have been covered. IELTS of 9 - a non-issue
Education level 9 - a non-issue