Single Comment

It is highly preferable to quantify this factor if at all possible (in
accordance with L. Lynn Smith's proposed criteria, in my opinion). 
Otherwise, the sought game-specific evaluations are likely to degrade into
a chaos of widely-disparate subjective opinions and value judgments,
impossible to reach a general concensus on and hence, not readily useful
without reservation (as a table of values).

Whatever important game-specific factors are not accounted for by the
main, proposed initial sensitivity criteria can be supplemented by another
factor, designed for that purpose, as a positive or negative adjustment to
the total.