Gunship DPS/HP

Formations have stopped them stacking as easy as before, if anything stacking makes bombers and gunships weaker the way the peregrine is atm.

They still stack when they attack, which is the whole issue really. Sure formations make things prettier/stop Flak being able to wipe out an entire airforce at once... ostensibly... but Air still stacks to deal damage.
I haven't had games ruined by peregrines.

Lucky you.

Peregrines can't stop you building Flak unless you're completely relying on Air. Bombers and Gunships end games too easily at the moment because of stacking.

But they do stop you using air, land, naval and expanding beyond the borders of your little flak base.

... A Peregrine is a T2 Fighter. It attacks other Air units. Sure, that needs to be balanced, but it doesn't stop you using Ground/Naval. It's Bombers/Gunships which do that, for which I feel the first step of balancing is to prevent them stacking up and dealing potentially unlimited damage. That way you aren't reliant on Flak to defend you from Air's unlimited damage.

If I have peregrines then you don't have any air units, which means my bombers/gunships prevent you from using ground and naval other than sitting idle in your base next to your flak.

So what you're saying is that Bombers/Gunships are imbalanced. Peregrines are Air-Air combat. They are not the things preventing you moving outside your base, nor is altering them going to change the way Bombers and Gunships interact with Ground and Naval.
The solution lies in not allowing Gunships and Bombers to stack and deal unlimited damage to Ground/Naval units.
Air Fighters will always be a spam contest - the best you can do is to prevent this ruining Ground-Naval combat by preventing stacking of Bombers/Gunships.

Great, now I have Bohemian Rhapsody in my head...

Peregrines ruin the game because everyone has to have them. I have my horde in my base, you have your horde in your base, and whenever air is sighted the two hordes roar out to do battle and wipe each other out. Then the rest of the air force can emerge to play the game. Which is why Peregrines will never really fight one another, they'll just spend a lot of time posturing and picking at the edges, because if someone loses the Peregrine battle they just lost the game.

In my experience they're so fast that you can generally do passes with a small number of Peregrines over a base without too much risk, preventing your opponent from ever re-establishing their air force. Hell, you might even lose an air factory if you're unlucky enough to be launching something as they pass by!

It's an improvement over what we had before because air cancelling itself out like this allows the ground game to continue, but it's a ridiculous situation to be in. And if you let someone beat you to T2 air, oh my you're likely fucked.

Air isn't a very exciting balance right now.

That's been an issue since SupCom with Air Supremacy Fighters. It's been an issue before the Peregrine with T1 Air spam. I agree with you entirely that this Air spam is the worst kind of game. I think part of the answer is to make Air-Air damage lower.

I'd prefer to lower speeds so it becomes more like the land game where I can actually catch you out of position. You can't do this in the air because everything moves so damn fast. It's why air is a single blob and it all comes down to who has more.

This is why I feel like static AA in general should be more effective then anti-ground aircraft.

Because aircraft and pick and choose their battles, and static defences cannot.

Ground AA in the very least needs a range buff. Mixing a few basic AA units in with your ground horde almost never helps because by the time bombers and gunships come into missile range they've have already started firing or dropping their payload and your stuff is gone. Not sure what's up with the new Gunships though. They do have a good bit more HP.

Gunships should be the fast glass cannons for picking off single targets and hit and run. Bombers should be for clearing larger blobs and more static defenses.

Lets see Brawler/Broadsword/Restorer/(whats the name of the new one). They really love their gunships. Hey at least it can't also shoot at air.