e,g, and k are all signs of apostasy.

But we really only need one measure:  How many confessions heard per week.

Supplement it with:
Number of infant baptisms
Number of adult baptisms
Number of adults finishing sacraments of initiation
Number of Protestants being received into full communion
% of nominal Catholics attending Mass on Sunday
% of nominal Catholics confessing once per year
% of nominal Catholics making their Easter duty
% of nominal Catholics who understand Church teaching and agree with it
Number of radical sanations and convalidations per year.

All these externals indicate conversion: a turning to Christ.