I think you need to do some more credibility testing especially over the VAT filing. As a small business owner my experience is that submissions for the last three quarters have been seemless. Maybe the single person used as an example is one of those that gripe when any change is made. Do you remember the whining when online businesses had to start paying VAT back at the beginning of 2015? Where are they now?
Why not provide some more and specific details. Perhaps chase up other business owners reporting issues rather than relying on one example. Surely Sage and other volume processors would have some stories if the issue is real. They have no advantage keeping quiet if the problem is with HMRC. The "we've been trying for two weeks" line seems unlikely unless the user has made a mistake or is using software that does not work.