Some form of rational rating method is needed... but...
... additional factors and many variables make it even more complex.
Though... the overall characteristics of any set of phones distinguish them from any other... this is only in a very general context, that almost makes any generalized rating method useless.
Everyone knows that the source and amp determine the sound of a particular set of phones, as well as the recording - a set of phones will sound dramatically different (good or bad) depending upon these factors... and...
... the optimum sound one set of phones achieves with one particular set up, will be different than their sound with another set up... as well as... different than another set of phones with that set up, or another set up.
In other words... it impossible to compare the specific sound of phones to one another, unless stated in the context of of all these variables, which are not at all consistent from one set of phones to another.
In order for any such rating method to be useful... the set up would have to be "standardized" and all phones rated in the context of that "standardized" set up vs another "standardized" set up against which all phones would be rated in the context of that "standardized" set up... etc... etc...
Even then... you still have the remaining challenge of rating combinations of "standardized" set ups and phones across those set ups.
All of which is to say... absolutely no firm conclusions can be drawn from one set of phones to another without a much more rigorous evaluation process - which would require a "lab" setting.
All of which is to say... you really can't expect any set of phones to sound like it does to those recommending them, unless you have the identical set up and recordings - they may sound very much better, or worse... depending all of those variables.
This is a point which is not well understood by many, if not most, Headfiers.