I've been playing against the infected for a bit and while I enjoy the fights against them, there are two things I really don't like about them. One is the spitter bomber with the atropos(I). It feels like a race against time ot take out carriers with them since they are so powerful. Maybe you could reduce the range of their missiles so they don't pop out of the carrier, fire and then return to repeat the cycle?
The other thing is the scab, the frigate with the large missile slot.
I like the idea behind it but the variant with the hurricane mirv is a bit too dangerous. It's a small ship and it can hide behind allies, so you just get shelled by fighterwings and hurricane mirvs.
I often don't see them on the battlefield until I get hit by them.
The other thing I noticed, that might be balance breaking is that they are dropping some reallly good loot. As in, maybe a bit too good. Can you reduce the chance for them to drop their weapons/increase the chance that weapons get destroyed?