If that happens, not only will Smugglers demand rifles and Troopers demand pistols, but Bioware will have to give both to everyone, because otherwise there will always be someone complaining about having less choices. Smuggler rifles, imperial agents with pistols, do we really want to see that?
Better not to begin that mess, things are good enough they way they are.
most of the gear is already itemized for those classes, there are blaster rifles and auto cannons with aim, there are blaster pistols with cunning. no reason why they couldn't be given to the respective side that doesn't have them (BH-br, ac; trooper-bp, smuggler-bf, IA-br)