you’re right. Those not in the privileged group have to be staying at the hotel for seven nights, but I’m hearing are allowed out. Those of the 63 countries are free to leave Bangkok and go elsewhere.
No, an e-ticket number is not included in a reservation. If you require an e-ticket number, you will need to buy the full ticket.
I was reading somewhere airlines are requiring an e-ticket, not just a reservation.
I’m thinking the best option might be to check ahead of time as to where you might head off to and have it handy for buying the ticket if the airline demands an onward ticket.