It’s cute that you actually believe you understand something about the issue at hand.
So what does this solve, except that fury will have an easier time getting into keys? Some other spec will take the position of “least wanted spec”, and you’ll have the exact same problem, but for another spec.
Yes, fury ought to be buffed if they’re that far behind, and they would also need a redesign to actually be useful in m+, as damage alone simply doesn’t cut it.
However…
The solution is in his hands if he wants to get into keys.