Why not add 5 types of ships to choose from at the beginning?. Balanced - Raider - Support - Trader - Tank. ( Raider does much damage, support can heal, trader get's more money, tank haves a lot of hp, balanced is all balanced! ) :D.
Riot shield power isn't enough, it maybe be bullet-proof, but it's stability isn't good enough, 1 bullet can make the riot shield go down. and then destroy the thing the riot shield was protecting.
They're coming soon!