So, is function order important to typology or not? If so, then an INTJ is an Ni dom, end of story. If not, then an INTJ can have Te as a stronger preference, but still exhibit the traits of an INTJ.No, they don't. Have you actually read Lenore? No one claims that the functions always occur in that exact order in practice; the function orders only represent ideal balances that offer the most well-rounded personalities.
Then we have the whole issue of whether functions can even stand alone to begin with. Can a perceiving function truly be independent of the judging function it is filtered through? If not, then you would be defined by at least 2 functions used in tandem, say Ne and Ti, for instance. And in some instances, you would prefer to lead with Ti and in others Ne, correct? Why does this have to be a zero-sum, all or nothing equation?