There have been lots of people sharing their rejections which is scaring people, so I thought I would share 2 approvals.
We initially applied from London in Feb, we both met all of the soft-power requirements and provided a lot of additional info but the business couldn't provide the additional paperwork requested so we cancelled (to avoid a rejection on our files), did some more travelling, then flew to Hanoi and applied from there in early May. We were asked for additional proof that we were in Vietnam and provided it. About a week later we got our approval.