In my opinion is better to just fulfill the requirements of the visa and be thankful you don't have to stress about your status. Otherwise just go for the 2 visa exemptions and do want you like.
Interesting given the land entry is unlimited how does someone show evidence of their intention to leave Thailand within the 60 days? My understanding is that the criteria for the visa exemption is a flight out. Does this now mean a booked train ticket would be ok?