Well my distrust stems from the whole UI-lag and loading-in issues of other players and NPCs that was so rampant during the first few months, and I always got the feeling that SE were trying to milk their servers for all they were worth, going so far as to minimise sent-data wherever possible (and that might include unique NM pathing and whatever extra data such a feature would entail).
And sorry to rain on your parade, by the way. If I was in charge I would say "hang the servers, give me dynamic NM hunts at any cost."
Whats the point of having servers anyway if you dont have features that attract players?