It contains utilities to do just about everything you feel is lacking, save some major interface overhauls. I agree, the interface is byzantine, but at the end of the day, it's basically like emacs or vi....
Tools in the Newbs Pack include 3D fort imager, StoneSense, Dwarf task/military/nobles manager Dwarf Therapist, dozens of pixel art packs to turn your d's and c's into little dogs and chickens. There are even tools to directly modify the game: turn off aquifers, turn off invasions, remove races, turn off vampirism, limit the number of children.
The only wasted potential in Dwarf Fortress is people who maybe can't get into it because it's so freakin' complex. Tarn knows the code's a mess. He's not a programmer. He's a mathematician. He writes code that works, and when it does, he moves on. Nothing in Dwarf Fortress was written to be touched by an outsider. It's a truly personal project for the Adams.