Yeah, the concept of species is tricky, in general xD Specially with the new information in recent years about hybridisation, things have become complicated. Mind you, i don´t think it´s very relevant if a given animal is a certain species, subspecies, or whatever, as far as it´s uniqueness is recognized some way. The taxonomic level of its name is irrelevant so long as it has a name xD What´s important is that we know they exist as something special and unique and that we recognize that. That´s part of the reason why i find revisions in taxonomy fascinating, because they tend to bring to our attention "new" creatures, regardless of what name they are given. After all, each individual is free to suscribe to whatever taxonomic hypothesis they want. Some people still consider T.pygmaeus to be a subspecies of T.marmoratus, and it´s not a problem as long as we all know we are talking about an animal that is distinctive and unique by itself (species or subspecies, it´s all points of view...).
As you say, it´s important for conservation laws, awareness, etc..