Thanks. Yep, it's complicated. No answers apply to us in my extensive reading.
Because we're a same sex couple I have no recognized rights as their parent in Thailand. And can't adopt in Australia because they're in Thailand, (but not yet Thai). We are happy to stay in Thailand but would like our kids to have as much opportunity as possible. Being Australian for them, would have more possibilities.
The law here may change. But it's been talked about since 2012. That would solve a lot of issues.