Speaking only for myself; while function is paramount, the "looks" of a weapon are important too. While I wouldn't do something that would degrade reliability or accuracy just for looks, I am quite willing to have my cake and eat it too.
The Wilson brake, as well as Armalite's recoil-check, stay in compliance with the law and give the weapon a pleasing appearance. The Smith Enterprises post-ban comps aren't bad either, as long as they are installed in compliance with the maker's instructions ("dimpling" the barrel and using Loc-Tite on the set screws...I've seen improperly installed ones go downrange really fast).
As to loudness; A centerfire rifle is going to be loud. The muzzle brakes and comps do tend to direct some of the muzzle blast out to the sides. Since we wear hearing protection while practicing, big deal. Sans ear plugs, as in a hunting or defensive situation, only a round or two is going to be fired. Again, big deal. It's not like a pre-ban or plain muzzled .223 rifle is quiet.
Rosco