Sarge 75 , I have heard similar comments from ATC there. But let's wait a few more days.
I was in KTM for work a couple of years ago, and the bad vis/fog/smog in the morning was a fact of life in this time of year. Delays , diversions and/or cancellations the norm, but this was before RNAV and during the VOR / 9 deg glide slope era.
In view of other incidents in other airports with visual RNAV APP, My question to crews operating there today would be , does the RNP creates a feeling that more is possible with it, and bringing more trust into the system . In other words, would you attempt an APP today in certains conditions with RNP that you would not have done a few years ago ?