That's very interesting and I need to reflect on it. My initial reaction is that option 2 won't lead to much. Maybe we need to think what supporting orgmode should achieve. One thing would be to allow people like me having lots of org files to easily migrate them into dendron (I used pandoc for this purpose). Another would be to support specific orgmode features that go beyond the markup part. The issue with the latter is that orgmode has such an incredible large set of capabilities that even long-time users seem to use completely different parts of it. E.g. I find the clocking features very handy for time tracking but don't care about exporters and publishing.