To put it simply, it's a waste of time.
If you'd like a more detailed explanation i'll give you one, but it should be obvious to most already but if it isnt obvious then reading this will be more helpful to you than anything you'll ever say on this site would be helpful to me.
The reason that going in-depth in trashcan specs bis lists or stat weights is fundamentally a waste of time and benefits nobody is that the only times bad specs will see play is in pugs, there's no reason to minmax in a setting where 60-80% of the population are fresh players with 6-7 slots missing and 1/3rd of your hp/dmg output, it's the equivalent of minmaxing your gear to kill level 5 wolves in elwynn.
Fury warriors have seen absolutely 0 play in competitive games where minmaxing and multiple sets are necessary, nobody has even thought of bringing one, so bis lists like this are helping nobody who need to be helped, bis lists for 'fotm' classes can at least be used in a competitive setting.
In my personal opinion nearly all bis lists are pointless as we're talking about 19s where viable options for any 1 slot can be narrowed down to 3 items max (per set's functionality) and if you can't look at 3 items and instantly recognise which is superior then you're not somebody worth listening to.
tl;dr - pug only bis lists are a waste of time.