The relative quantity (not quality) of qunari hairs is due to a prioritization of horn styles over hairstyles. Had they done a full set of horn styles and hairstyles, qunari would have twice as many CC options as any other race and would have "taken" from the overall pool of resources.
As it stands now, Qunari have markedly less customization options than any of the other races. Also, why is it necessary that all races receive an equal share of resources if it means that races end up with unequal end-quality?
A )
Qunari have approximately 24 slider options for their hair+horns, of which there are 3 distinct hair meshes and a bit less than a dozen horn meshes (of which about a third are broken variants of a singular horn model)
Humans/Dwarves/Elves have approximately 24 slider options for their hair
Humans/Dwarves/Elves have roughly half a dozen tattoo options unique to their race
Qunari do not have CC tattoos
All other CC options are considered equal among races, and so can be ignored.
When making a Human/Dwarf/Elf character, there are 24*6 = 144 variations, when considering these options
When making a Qunari character, there are 24*1 = 24 variations, when considering these options
144 > 24
Now sure, horns aren't the same as tattoos. Horns require their own meshes and texturing, and so require more work. But... Humans/Dwarves/Elves also gain access to a veritable plethora of hats, helms, and other headgear that require their own meshes and texturing. Qunari get a few variations of face paint.
Also, while Humans/Dwarves/Elves have 24 unique hair meshes, Qunari have access to 3 unique hair meshes and 10 or so horn meshes, for a total of 10 + 3 = 13 unique available meshes.
24 > 13
So as it is, the skew is definitely in favour of non-Qunari. And it's not even a small discrepancy. There are many fewer possible combinations open to Qunari - they are the race most lacking in terms of diversity.
B )
Why is it automatically a bad thing that Qunari get slightly more CC options for unique racial features, or require a slightly larger percentage of the CC resource pool? It would be foolish to allot exactly the same amount of time and resources to each race. Equal share of resources does not equate to equal quality. Some races can share resources, and other cannot. Some require unique models. All races should appear to the end-user to be equal in terms of their quality. That Qunari have access to cool horns does not mean that they deserve fewer hair options to 'balance them out' so they have the same number of CC slider options as Humans. Should Dwarves get fewer hair options to balance out the fact that they may have a few unique Dwarven beard options? That one race has a feature that others do not is no excuse to skimp on that race's other features.