Alongside the DLC release, the baseline version of Airships is also getting an update with some new things and rebalancing. Landships are now available at tier 0, using wheels instead of tracks. Of course, these landships need to be propelled somehow, which is why there's now teams of lizards you can attach to your vehicles. They're not very fast, but they're cheap and work perfectly fine.
The game now supports weapons with arcing ballistic trajectories. Most weapons still have flat trajectories, but grenades, ballistas, and heavy bombards have arced ones. In addition, there's now trebuchets as a tier 0 siege weapon, and mortars, which you get along with cannons.
Some modules got a major redesign, such as imperial cannons, which now do splash damage, acid spitters, which are now rapid fire, and targeting computers that now assist guided missiles.
The weather will now sometimes change during a fight - rain starting or ending, dusk turning into night, dawn into day, and so on. And there's a bunch of performance improvements and bug fixes, including a fix to a desync bug that's been plaguing the game for about a year now. Here's the complete list of balance changes:

• Imperial Cannon: 400 -> 120 Piercing damage, Added 5m piercing splash radius, 7s -> 9s Reload time
• Suspendium Ray: 12 -> 15 Piercing damage
• Junk Sails: +50% HP
• Acid Spitter: +133% Shot speed, 3s -> 0.35s Reload, added 3.5s clip reload, 3 -> 20 Clip size, 10 -> 8 Blast damage, 8.5m -> 5.7m Blast splash radius, 30 -> 16 Direct damage
• Aerial Charges: +45% Shot speed, 3s -> 2s Reload, 1 -> 2 Number of shots
• Big Tracks: Added 600 ship HP bonus
• Small Tracks: Added 250 ship HP bonus
• Bomb Bay: -20% Shot speed, 6s -> 0.6s Reload, 1 -> 3 Clip size, Added 7s clip reload time, -33% Accuracy, 40 -> 30 Blast damage
• All cannons: -10% Reload time
• Command Centre: 400 -> 250 Cost
• Kinetic Bomb AKA Droppy Rock: +40% Shot speed, 2 -> 4 Clip size
• Flamethrower: 5 -> 6 Blast damage
• Giant Flamethrower: 15 -> 16 Blast damage
• Aircraft Command Deck: 500 -> 260 Cost
• Gaff Sail: 25 -> 20 Cost
• Grapeshot Cannon and Sponson: 8 -> 14 Piercing damage per shot, 28m -> 43m Shoot troops range
• Guided Missile: 25s -> 35s (25s with Targeting Computer) Reload, 3x (2x with Targeting Computer) Inaccuracy, 105 -> 90 Blast damage, 13m -> 14m Blast splash radius, 214m -> 285m (186m with Targeting Computer) Minimum range
• Hussar Rifle: +10% Accuracy
• Large Suspendium Chamber: 240 -> 220 Fire HP, 200 -> 180 Explode HP
• Suspendium Cannon: 90 -> 100 Piercing damage, Now obeys fire mode
• Targeting Computer: 400 -> 300 Weight, 20s -> 60s Coal reload, 3 -> 2 Crew, improves Guided Missile (see above)
• Heavy Bombard: 44 -> 50 Blast damage, +30% Accuracy, Made trajectory ballistic, Added 450m max range, Added 28m max up range, Added 0.7x accuracy multiplier against airships
• Ballista: Made trajectory ballistic
• Grenades: Made trajectory ballistic
• Aerial Hussars: +40% Acceleration
• Steel Wall: 36 -> 40 HP, 5 -> 10 Blast damage absorb
• Steel Armour: 50 -> 60 HP, 16 -> 22 Blast damage absorb, 6 -> 8 Piercing damage absorb
• Heavy Steel Armour: 90 -> 80 HP, 24 -> 30 Blast damage absorb
• Brick Wall: 2 -> 4 Blast damage absorb
• Stone Wall: 80 -> 85 HP, 4 -> 6 Blast damage absorb
• Massive Stone Wall: 130 -> 150 HP, 6 -> 10 Blast damage absorb
• Wooden Wall: 24 -> 30 HP, 2 -> Piercing damage absorb
• Heavy Wooden Armour: 75 -> 90 HP, 6 -> 8 Blast damage absorb, 12 -> 24 Piercing damage absorb, 12 -> 16 Weight