Assaults (and commandos) are meant to be offensive capabilities, their weapons. Thus they have bonuses to their weapons. If everyone could get weapon bonuses through these role weapons, then it cheapens it. Not everyone's role is about weapons, so everyone having bonuses specific to weapons doesn't fit.

Commandos are already getting a reload bonus, so that's pretty redundant.

Scouts are blue.

A ROF bonus is a DPS bonus (shoot more per second = do more damage per second). It further steals the role of the assaults (and commandos) even more than the general idea already does.

I don't see why basic lights/mediums/heavies would need their own roe weapons since they're (supposed) to just be more generalized with less of a specific role (unlike specialized suits like assaults, logis, etc).

I admire the creativity, and the idea has a certain allure to it, but I won't support this as long it allows other roles encroach upon the purpose of assaults and commandos, which is being good with weapons.

Likewise, if you proposed role-specific equipment that received bonuses from their corresponding dropsuit specializations, I would be against it, because equipment is the role of logis (with the exception of the upcoming cloak), and it would cheapen the logi's role.