I've read that this might have something to do with the Frostbite engine. It was built with a military combat game in mind, where almost all the characters would be expected to have "21st century commando" hair. Nearly all of the games that have utilized it so far it fall into that genre - Inquisition is the first RPG, and I also think the first one with an extensive character creator, let alone nonhuman characters like the qunari. So theoretically, Bioware has had the challenge of adapting an engine that wasn't built to do much with hair into doing anything with hair. The result is what you're criticizing. I doubt it's purely a stylistic decision, most limitations in games come down to time, money, and resources. Bioware's never been the best at hair styles to begin with, so combine that with an engine that's ostensibly trickier when it comes to hair than an engine that was built from the ground up with RPGs in mind, and voila.
Not only that, but the engine wasn't even supposed to handle 4 legged animals (horses, dragons, etc) they litterally had to change the whole engine to work for an RPG and its components. I'm assuming the hair limitation is part of that engine problem. Mike's mentioned that they are looking into providing more hair options in the future, probably when they release the Black Emporium type thing that DA2 had to change your character when ever you felt like it in the game.
I'll put up with a bad haircut, as long as I have my 1 million options in the CC (which we now have). The texture look awful, but it's not a game breaker. I hate clipping personally and the hair mods in DAO and DA2 drove me absolutely crazy. Who has hair like that in battle / field? Perfect manicured eyebrows while weeks in the dirt and mud?
I like the realism of "No one has time to bathe, shave and pluck eyebrows in the field, it's war!" and Mike's mentioned that the clipping issue with long hair was a deterrent to those types of haircuts, but they were looking into it, if you watched any of the early twitch streams.
Personally, hair is the last thing I'm concerned with.