Some aspects of the brain, of thought etc are hierarchical, some are not.
Heterarchy may be defined as the relation of elements to one another when they are unranked or when they possess the potential for being ranked in a number of different ways.
Heterarchy might be an interesting way to relate some things but as a quality it is completely subservient to paradigms.
So you can force the concept of heterarchy to be meaningful, or you can force it to be meaningless.
It might be ,revolutionary' for a moment but it's not a touchstone.