I think that there should be more than one airport in Nepal rather than just Tribhuvan Airport in Kathmandu. This airport is class 4 but only serves ~1.26Mil whereas the internet (which is occasionally unreliable) says the metropolitan area has a population of 2.5Mil which is a lot more reasonable.
I would love to see the inclusion of several other major Nepalese airports like Pokhara, Biratnagar, Lumbini, etc. These all serve large populations inside and outside the urban areas. I would also like to see some airports in the lesser populated western side of Nepal.