@John-Paul *****
It's not about "discretion" so much as following the immigration rules. Foreigners with no visa or a tourist visa or any multiple entry visa can come back for a new entry. For those seeking a visa exemption when returning, if it's their first or second land based one in the same calendar year, it will be permitted. If it's their third, passage will be denied.
For those of us who like to make a trip out of it or are actually interested in visiting Myanmar, it's not an option right now except maybe (according to reports) at Mae Sai.