Bonuses should not cover a weapons weakness, that leads to homogenization. The bonuses should emphasize weapon strength.
For Caldari it should be either range, spool reduction, or kick reduction.
For Gallente it should be a very minor damage boost.
For Minmatar it should be blast radius on explosives and ammo capacity, not clip size.
For Amarr it should be charge up reduction and damage ramp-up increase.

The last thing, weapons and tanks shouldn't be as closely linked. For instance Caldari and Gallente should get their respective bonus to all hybrid weapons. This way if you are focused on shields you can still go any hybrid weapon but they'll perform differently than a Gallente suit using a hybrid.

Explosives are viable on either armor or shields as Minmatar traditionally can go with either.
In the current state you are restricted to weapons based on what tank you want or vice versa and that's a shame as it's not the case in eve and it's one of the huge draws of fittings in Eve.

Increasing viable build variety is important for enjoyable gameplay and the current bonuses do the opposite.

I am afraid that for the caldari rail rifle and magsec to be better harmonized with an assault suit skill worthy for the assault would be to significantly raise their charge times to the point it becomes an inconvenience to most operators; make it a very uncomfortable weapon to use in cqc, or even in its extended range but not make it too high of a charge that one cannot get the first shot out before he dies to a threat he prepared against first.

DPS is not just a measure of the damage per round but a measure of how much damage you can sustain over time. Being able to reload quickly and reapply damage increases the DPS in a more subtle but often winning way. I've personally lost count how many times I've gone one on one with another assault or logi, with both of us firing at each at the same time, and I've won the encounter, purely because I've reloaded my clip and firing at them before they've even pulled their old clip out.

Suit bonuses are a trivial issue. Everyone who thinks balance and all these minor things matter are kidding themselves. All that matters is actual MMO content being added tot he game. PVE mode, player market, all the things talked about before turning DUST into a simple lobby shooter.