I have a tiny bit of feedback on the air cruisers. I've seen/heard comments that right now they don't feel like a big threat but more just kind of a nuisance to shoot down, and I sort of agree.
It feels annoying to fire a volley of 8 MLAA's at a cruiser, just to only knock out one turret and the rest of the missiles are completely wasted because they hit the body at a bad angle and did no damage to the other turrets (I know that it's player error, and if I made sure to fire from straight above this wouldn't happen, but being forced into one attack angle adds to that 'chore' feeling of taking cruisers out).
Random suggestion: What if the cruiser's body had a set (large) health pool and every hit on the cruiser does damage to that pool, but destroying a turret/sub-system deals a significant chunk of damage to that pool (like 20% or something)? That way attacking the subsystems is still the most efficient way to kill them, but you don't end up with disappointing "misses" just because the angle wasn't quite right. I don't think any additional HUD element for the body health would be necessary, but just knowing that my shots are still doing something would make engaging the cruisers a bit less tedious.
As for the "not a real threat" feeling, I think the AA guns are the main culprit. A wide, random cone of bullets that rarely hit and only do 1-2% damage when they do doesn't give much feeling of danger. More accurate bursts that actually require evading could lead to cruisers (and ground-based AA guns) being something to actually respect and keep some distance from, rather than being able to fly straight over them without a scratch.
Just a thought to consider. I certainly don't think the cruisers are BAD in their current implementation; they're perfectly fine, but I do think they could be made a bit more interesting.