I hope that Sukyi official get pragmatic, they should not follow the same mistake Syrian rebel did when they have chance to make a deal with Assad regime under Saudi/UN brokerage.
We will see what those US/EU countries will say, currently US is still busy with that terrorist event in Capitol Hill, but maybe they dont want to comment on ASEAN Meeting that possibly include China and Russia in it. I dont know about the meeting detail, but I guess they are trying to get world powers and both China and Russia are very influential inside Junta mind.