A few things I'd like to see added to the game, and why I'd like to see them. I tried to come up with good reasons to add each to the plane set, not just "I like this".
#1 Perked A-26B and C Invader bomber.
Details in other threads, but this high performance medium bomber/attack plane is the ultimate WWII attack plane in the B-configuration, and superior penetration bomber in the C-configuration.
Given this one bomber with multiple configurations, gives the buff drivers one (or possibly 2, depending on how presented) bomber(s) to spend buff perkies on, that is not a B-29 or existing Ar-234. Possilbly limit number of bomb-and-bail buff drivers who don't care for the Ar-234 and buff perks. Faster and carries more ord than Ki-67 or B-26's, and B- configuration could have up to 14 forward firing .50's.
#2 Perked GERMAN 88mm GUN
Flak 18, 36, (or 37 AA only version), mounted to Sonderanhaenger 201 trailer with permanent tow vehicle attached. Could fire high explosive (HE), armour piercing (AP) or smoke shells, and be used in AA role. With APCBC, it could penetrate 130 mm of armour at 1500 yards. Not very maneuverable or fast, very vulnerable to incoming fire of any kind, but effective in defense to snipe at range, bombard towns, and force buffs to higher altitudes.
Vertical range 37,000 feet
Horizontal range 16,000 yards
Rate of fire 15 to 20 rounds per minute.
Gives the GVr's another vehicle to spend GV perks on, forces bombers off the deck. Finally have the King of the Battlefield, Artillery, represented in AHII..... but limited use by perk costs.
#3 P-39 Airacobra OR P63 Kingcobra
Also see thread elsewhere on details. Half the P39's and nearly all P63's were flown by Russia. Give the EW another plane. Give the Russians another plane for their plane set. I'd recommend it be given a Soviet skin, in recognition of the Lend-Lease Act, and that the second highest Allied Ace was Aleksandr Ivanovich Pokryshkin, and he reportedly flew the P-39 throughout the war (although some sources state he moved to the P63 late in the war).
#4 Lightly Perked Fiat G.55/I Centauro
Reportedly a better fighter than Bf109G's were. Only 130 produced, and limited operations before the armistice, but give Luffenwaffle pilots a 109 better than the 109 (and not another 109) for small perk points, 3-20's and 2 13mms made for a good bomber interceptor. Give the Italians what was probably their best WWII fighter.
#5 Yokosuka D4Y Suisei (彗星, "comet") "JUDY"
Maximum speed: 342 mph (550 km/h) Range: 910 miles (1,465 km)
Two fuselage-mounted 7.7 mm Type 97 machine-guns and one rear-firing flexible 13 mm Type 2 machine-gun,
Bombload: normal: 310 kg; maximum: 560 kg; suicide: 800 kg (don't see this option being included).
The CV fleet could use a more effective attack plane in their planeset, and the Japanese planeset is kinda limited. A faster, more survivable carrier-based dive bomber. Half the bomb capacity of TBM. The option for 3 RATO boosters for short takeoffs (or with max bomb load). may be fun too. 2,038 were produced during the war.
Those are the Five I'd like to see the most at this point, and my reasons for each.
There are MANY planes that could be added to the game. Tempted to add the Yak 3, but the P-39/63 gives more variety. I tried getting away from the American, German, and British planeset which are rather well represented, but the Bell submission can be justified in Russian planeset, and I can't find another bomber from WWII we could add for buff perks to be spent on outside of the B-29 (not getting), or the He-177 with it's guided ord (which we are not getting). He-188 brought up in another thread, but I don't feel it's good enough to be an effective buff perk point economy sink. Italian bomber too much like the B-17. Russian bombers not that perk-worthy, IMHO.
Can't see adding the night fighters, as we don't have night in the arenas.