I've said this before, but I'll do so one last time. Give an additional bonus to each racial suit in order to increase it's survivability, and thus it's killing effectiveness.

Gallente:
3~5% Bonus to Armor Repair Modules and Reactive Plates Per Level

Result: Gallente Assaults become an armor buffer tank who get additional eHP and repairs from reactive plates and a lot better repairs from their armor repair modules. Gallente assault becomes viable.

Amarr:
3~5% Bonus to a Armor Plates and Ferroscale Plates Per Level

Result: Amarr assaults become armor eHP tanks, basically becoming a light heavy suit with a smaller hit box. Amarr assault becomes viable

Caldari:
3~5% Bonus to Shield Extender, Recharger and Energizer Modules Per Level

Result: Caldari suits become shield eHP tanks with super fast shield regeneration. Caldari assault becomes viable.

Minmatar:
20% Increase to Damage Modules and 3~5% Increase to Shield Regulator Modules Per Level

Result: Minmatar Assault becomes a hit-and-run shield buffer tank with high DPS and low eHP. Minmatar assault becomes viable.




The Minmatar bonus is tricky because you don't want to make it tanky but you want it to be effective. Giving it a bonus to 20% damage mods lets their damage mods to 10% at level 5 instead of the current 5%, thus helping them to make up for their ridiculously low eHP. And the regulator bonus also helps them make up for their low eHP by helping them get their shields back more quickly.

I think the other bonuses speak for themselves.