Thank you for posting this interesting presentation.
The recent optimism seem a bit exaggerated.

The bad news is that revenues keep dropping.
That is in part due to cutting a few routes, but mostly due to a reduction in yield (THB/km) to the tune of -7%. That's bad. The cabin factor (load) increased as passenger production decreased more than passenger traffic. But TG had to reduce its fares to attract pax. Freight is also bad. Revenues would have been worse, if there had not been a significant increase in "other revenue" (non-Pax, non-freight) and I don't know what that is.

The gain is on the cost side.
Non-fuel expenses have dropped by 8 billion BHT, and that is good. Of course, that is partly offset by the special items of the reform plans.
Fuel expenses have dropped by 16 billion.

The question for the future is pricing and competition. With fuel prices down, all airlines are lowering fares. If TG manages to maintain reasonably-high fares, it will generate operating profits. If its competitors with a cheaper cost base offer cheaper fares, TG might have to follow. The ME3 have 13 flights to BKK, many A380s. LCCs are tough competitors on regional routes. TG is not the price-setter on most of its routes.