Bombers still work. Thats a fact. Fighters… hm well. one fighter works.
JU88 with 16x 50 und 4x 500 lbs Bombs rocks hard.
Stuka B1 with 1000 lbs is to use as it was. as STUKA. Stuka is german vor Sturzkampf what means "Fight in a Vertical Line. from up in the sky, vertical down to ground, jericho sirens crying and then unlock the 1000 lbs and pull back up. If u do this with a churchill or any other tank and your bomb hits, this target is not there anymore.
stuka b2 with minethrower and 2x .37 Cannons is for breaking the shell of armored vehicles or planes. Only thing is: 4 shots and its overheated… that NEED to be fixed. 10 or 12 shots are necessary to break trough a tank. and the stuka has limited time to attack, because it need to pull up again. No need for higher fire rate but the overheating after 4 shots makes it useless.
BF109s - well… both are to weak atm. explosive rounds of the G6 are nothing else then .50 of spitfire VB (in dealed damage) and the G2 has to switch weapons for the larger machinegun. in my setup both are to weak against other planes.
Mosquito: Fast, but no passenger guns. my setup with 4x .330 nose MGs and 8 rockets… is not bad, but the rockets are to weak as well. its not possible to defeat an AA tank with them. I dont ask for rockets taht kill Tiger tanks on lvl 4, but a flakpanzer, the baddest enemy for a mosquito, needs to blow up when all 8 rockets hit. (and its NOT easy to “sneak” a mosquito close to a Flakpanzer without beeing seen!, so if i made THAT, i also want that tank to blow up)
Blenheims: I just use the mk2 because of 2x 500 and 8x.40 bombs. the other one is more like a recon plane with photography and radar and stuff. I also have it on lvl 4, but dont use it anymore. Blenheim mk2 has a great turret. it can turn around even to the fron side of the plane. 2 well placed 500s are able to blow up tanks as well. the 8x 40 lbs are not really strong if they dont hit infantry directly. splash damage is to weak i think.
Spitfires:
VA: THE machine of all. 8 mgs with much damage, low overheating rate and high fire rate. kills everythin in the sky and is not a firend of infantry. you can shot out a Flak38 driver without a problem from high up in the sky if he doesnt notice you. 2x 250 lbs bombs can be if they are well placed (there is no crosshair for them, even not the ciorcle in external view) the most dominating plane at the Battlefield sky atm.!
VB: well.. 2x standart mg and change to 2x .50 with medium damage and medium firerate. is usable but feels similar to the BF109 G6
Upgraded with 8 rockets (same count as the mosquito has) you can do some damage, but not to much. Is good to sneak at a Flak38 to blow the driver out, but as same as mosquito there is no vehicle/tank cracking possible
What would I change?
JU 88 - nothing
Stuka B1 - nothing
Stuka B2 - Decrease .37 cannon overheating for some more shots available to a target until it overheats. maybe slightly more ammo (just 60 rounds in mag atm)
BF109 G2 - More Ammo, higher fire rate of 2nd gun, less overheating
BF109 G6 - More Ammo, more explosive round damage
Mosquito: As Spitfire VB has 8 Rockets, why dont give the mosquito 12 or 16? Its still hard to master to kill somehitng with rockets because its more difficult then a bomb. So if someone can handle this, he should be rewarded with a kill (of a Flakpanzer maybe)
Blenheims: well. a recon plane and a medium bomber. its good as it is i think. Maybe the MK2 should be raised to the level of JU88. Maybe also 4x 500 bombs or more 40 lbs bombs
Spitfire VA: Man i like it as it is, but to be real, its OP atm. Everyone in that plane dominates the sky. but lets see what we could change. maybe a little higher overheating rate of the 8 mgs. And slightly reduce rate of Fire. - but to be honest, leave that beast as it is. just raise up the opther planes to the same level and strength 
VB: hm… same as G6. More ammo, raise damage of the .50 guns
Other Things I really need to say:
Flakpanzer; Valentine AA and Flak 38. You guys know what I mean.
The range need to be reduced moderately. AND/OR something need to be done against base camping with AA tanks. I just think on ARRAS or Panzerstorm maps. good position makes it possible to AA over the WHOLE map and no enemy tanks/inf can reach and defeat it. Thats a shame. Thats not fair, thats a Problem DICE needs to fix. Fact. Maybe set the resupply stations outside the spawn as it is on axis tank spawn at hamada. you need to drive over to G Flag for resupply the tank you started driving, in southeast of the map. I like that. For the way over to G Flag, german Flakpanzer still has 1000 rounds to fire, until hes empty.
Vertial Airspace on Panzerstorm Map is not as high as it is on other maps. I think there should be more vertical room. (Same AA problem here)