It has stalled because despite the efforts of the NAWAC, Olympic Project, BFRO, and many other earnest researchers out there, we still don't have a single piece of hard evidence to work with. If there were a definitive type specimen or even unambiguous DNA evidence, we could then do things like:
* Habitat mapping
* Species population estimation
* Primate cladistics (assuming DNA) and calculation of genetic distances to humans/chimps/Neanderthal, etc.
* Physiology and size range
* Ecosystem impacts
* Sexual dimorphism studies
* Behavioral, family group, kinship analysis
* Species protection programs
But no science can be done at this point because THERE IS NOTHING TO STUDY - except some really awesome stories.
I'm very open to the idea of sasquatches being real, but until we have actual proof, the only "science" is in the form of chasing shadows. Honestly, if the NAWAC guys can't bag a type specimen, I'm having a hard time believing it can be done (assuming there is an extant species.)