I honestly love games where you can use a pistol as a primary because it is just as powerful and just switch between shooting and melee (silenced pistol though). Hopefully I can add BRINK to my pistol list.
I honestly doubt that.
Lights could use Pistols as their primaries, because they're very limited in choice of guns. But mediums and heavies can use SMGs or even Assault Rifles as secondaries, so for them there is no actual need to take a pistol.
On that note, even though the thread might get locked soon:
Are pistols holstered in BRINK? It really bothers me that in Call of Duty characters have Pistols hanging on their back.
Rainbow Six Vegas 2 is great in that matter, because Pistols are stored in their own holster on the leg or waist.