Just a spoiler of things I still would like to see added.
USSR Tech Tree:
T44 Tank with D10T 100mm Cannon. There was tests to have the D10 gun on the T44. While the tank was mass made with the 85, I feel for high BR, the T44 would be better suited with the D10 gun for game balance reasons. It would make a great intermediary between the T34 - 85 and the IS series tanks. Having a T44 with 85 in the tree, and 100 as a premium would also be acceptable in my eyes
USA / UKC Tech Tree:
A36 Apache (Attack/Dive Plane Variant of P51 with Dive Flaps and Reinforced Wings)
- Guns: 6× 0.50 in (12.7 mm) AN/M2 Browning machine guns
- Bombs: Up to 1,000 lb (454 kg) of bombs on two underwing hardpoints
F8F Bearcat
- Guns: 4 × 20 mm (.79 in) AN/M3 cannon
- Rockets: 4 × 5 in (127 mm) HVAR unguided rockets
- Bombs: 1,000 lb (454 kg) bombs
B25H Mitchell
- 75mm Cannon
M1 Mortar:
- 81mm Mortar
- (Big Boy Mortars have armor pen in Enlisted … US and Japan lack these)
Germany/Italy:
Low BR Paratroopers in general should be added.
Breda Ba.201 (Italian Dive Bomber)
- Guns: 2 × 12.7 mm (.5 in) Breda-SAFAT machine guns
- Bombs: 1 × 500 kg (1,102 lb) bomb
Reggiane Re.2005 Sagittario
Guns:
- 2 × 12.7 mm (0.500 in) Breda-SAFAT machine guns in upper cowling (350 rpg);
- 1 × 20 mm (0.8 in) MG 151 cannon firing through propeller hub (150 rpg);
- 2 × 20 mm (0.8 in) MG 151 cannon in wings (200 rpg)
- Bombs:
Underfuselage (non standard) hardpoint 1,000 kg (2,200 lb) bomb or 1 × 300 L (66 imp gal; 79 US gal) drop tank
Hardpoints on wings: 160 kg (350 lb) bombs or 2 × 150 litres (33 imp gal; 40 US gal) drop tanks
Macchi C.205 Veltro
Guns:
- 2 × 12.7 mm (.5 in) Breda-SAFAT machine guns, 400 rpg, in the nose
- 2 × 20 mm MG 151 cannon, 250 rpg, in the wings
Bombs: - 2 × 160 kg (350 lb)
Carro Armato P 26/40 Tank
- Main armament: Ansaldo 75 mm L/34 gun
- Secondary armament: 1-2 × 8 mm Breda 38 machine guns
Japan:
Type 97 81 mm infantry mortar
- just like the USA, no armor penning high end Mortar is available.
Note: IMO, Japan really is missing some non-carrier options, so there are a few here:
N1K1-J Kai b (Attack Plane Variant - non carrier based)
- Conversion for dive bombing. One 250 kg bomb under belly and six rockets under wings.
- 4 × 20 mm (0.79 in) Type 99 Mark 2 machine guns in the wings.
Ki-27 (Non Carrier Fighter)
Guns:
- 2 × 7.7 mm (0.303 in) Type 89 machine guns, 500 rounds/gun
- 1 × 12.7 mm (0.5 in) Ho-103 machine gun and 1 × 7.7 mm (0.303 in) machine gun on later models
Bombs: - 4 × 25 kg (55 lb)
Ki-44 (Non Carrier Fighter)
- Guns: 2x fixed, forward-firing, synchronised 12.7 mm (0.500 in) Ho-103 machine guns + 2x wing mounted 12.7 mm (0.500 in) Ho-103 machine guns
- Optional provision for two 40 mm (1.575 in) Ho-301 cannon in the wings, firing caseless ammunition.
Ki-45 (Non Carrier Strike Fighter)
- one 37 mm (1.46 in) and two 20 mm (0.79 in) cannons and could carry two 250 kg (550 lb) bombs on hard points under the wings
Ki-51 (Non Carrier Dive Bomber)
Guns:
- 2× fixed, forward-firing 7.7 mm (.303 in) Type 89 machine guns (replaced with 2× 12.7 mm (.5 in) Ho-103 machine guns in later models)
- 1× 7.7 mm (.303 in) Te-4 Machine gun rearward-firing machine gun.
- Bombs: 200 kg (441 lb) bombs (normal operations)
