Priority in Athey’s predictor. Why there is no such thing in NevGen?

In Athey’s haplogroup predictor there is list box when user can select one of several areas: “Northwest Europe”, “South Europe”, “East Europe”, and others. Its effect on calculation of probability of some subclade is multiplying already multiplied frequencies of given haplotype’s alleles in subclade with subclade’s frequency in chosen area, before they are normalised with sum of them all. In NevGen there is no such thing, because of two reasons. First, NevGen across several of its levels have hundreds of subclades. For such number of them, how could be made any reasonable assessment of its frequencies in any part of Eurasia (for example, think only about N1a, R1a YP1051 or E1a, how to find out their percentages in any part of the World)? Another reason for no attempt to include Priority in NevGen is varying frequency in different populations or subregions even in some small part of the World. For example, J2b2-M241 is found in northern half of Albania at frequency of 25%. In neighbouring Serbs it has frequency of less than 1.5%. On the other hand, haplogroup I2a1b-Din is found in Serbs at 37% (according to Eupedia), but is found in northern half of Albania and in ethnic Albanians in Macedonia and southern Serbia (Kosovo and Metohia province) at only 2.5%. With such in-region differences, it seems nearly impossible to make any decent Priority model for NevGen predictor.