A few modifications I would really like, but haven't playtested.
Chaos - Desolator BattleshipAdd this rule from the Imperial Victory Class
Special Refits: A Victory class battleship may reduce the range of its port and starboard lances to 45cm in order
to increase their strength to 6 (from 4), for no change in cost.
Reason: The model is equipped with 6 lance turrets, and I really like that the number of lance turrets to match the number of shots. At least for Imperial/SpaceMarines/Chaos which have a broadly similar level of technology.
And as the refit is allowed on the Victory, it would probably not be game breaking on the Desolator.
Ork Battleships Hitpoints
I am very happy with what you have done for the Orks. Removing the randomness in the Blood Axe rules makes me actually want to play them again.
My ork ships are custom build, and the battle ship is almost twice the size of the cruisers. It has at least 25% more mass than the big chaos battleships. (The models are based on Legos). I should really post pictures of them soon. Anyway.
10 Hitpoints for the cruisers seems fair and works well. But only 12 hitpoints for the battleship does simply not match it's size. I would like an optional refit that gave the ship 14 hitpoints instead.
The rule does not need to be official, as all my games are against specific friendly opponents, but I would like to pay the extra points to not get an unfair advantage. So if you could advise about the price of such a refit? Perhaps 20 pts?
The Hammer Class cruisers
Since the term Grand Cruiser is not a proper ship size, I am unclear if they are intented to be Ork Grand Cruisers (more hitpoints and shields) or upgunned cruisers (battle/heavy cruisers).
If they represent ork grand cruisers, I would like a refit that allowed me to add +2 Hits. If they represent Battlecruisers, all is fine.
Assault KarriersAnd then a little possible error
In the Green Tide list, this entry is found
In addition, any Ork capital ship with launch bays may be designated as an assault karrier, increasing the strength of all its launch bays by +1 at the cost of losing the ability to launch any attack craft besides assault boats.
This is somewhat unfair for the larger ships, which have just one dorsal launchbay (D3+1), compared to the 2 launchbays of the Terrorship.