Well, the PAT announced 24-30 hr weigh-in, a huge change the sport. Get ready for tons of weight bullying (including bigger farang fighting small Thais in trad stadium fights). Basically for all practical reasons all weight classes have been expanded. This is in part in relationship to the labor crisis mentioned above, the capacity to draw from a wider range of fighters to fill cards. Trad Muay Thai will likely have greater skill disparities (shrinking talent pools) and now more massive size differences, as well as drawing in more farang who will become part of this solution. This will also likely mean more farang stadium/promotion belts in trad fighting.
Of course laws in Thailand are unevenly forced, so there could be major hiccups in implementation, including a significant problem that fighters now have to come to Bangkok the day before, which means even greater costs to fight...which could ALSO shrink the fighter pool. Already many gyms, small kaimuay, have difficulty even breaking even in Bangkok fighting expenses. Will outlying fighters be able to regularly afford to come to fight in Bangkok, especially in a scene that favors the political power of major Bangkok gyms (they can't dependably recoup their expense by betting on their fighters).
These changes could have a massive stylistic impact on Thailand's trad Muay Thai over time, as it gives even more advantage to size and power. Saenchai was famous for his criticism of the loss of femeu fighting after he left the trad stadium scene, because large-bodied power clinch fighters (who he had some trouble with) had become the gambler's favorite. With the even greater increase in size differential now, and the influence of more smashing and clashing fighting styles of Entertainment Muay Thai, it stands to reason that power will become even more effective over femeu skill than ever before. In the Golden Age there were fairly substantial size differences, but the technical skill level of fighters was such - and the trad artful scoring bias in favor of - that small fighters like Karuhat and many others could handle 2 or more weight class (in the ring) differences. This high level of the art just really is missing in this era, and scoring biases are shifting toward the power aesthetic. Trad Muay Thai may become much more combo-heavy smashy with the big man coming out on top.