I wished Wanna would consider training future liberos aside from her coaching gig too. She is the best Thai libero in their history and also one of the best in the world at one time. Young future libero can gain a lot of information from her, same with Nootsara and Pleumjit teaching young setters and MBs.
I think the only 3 current 3bb youth member that might have a chance in the future NT, are the tall 15 year old MB, the libero and tall setter. But even so, there are several tall young girls in other schools as well that are about 180 cm or taller. So there will be lots of competition for sure.