Yes I really feel the BB should be 20 IPC and destroyers at 10 IPC.
DESTROYERS
Description: Small, fast warships that hunt submarines.
(This is a revised rule for destroyers only, not a new unit)
Cost: 10
Attack: 2 (3 when an enemy submarine is present)
Defense: 2 (3 when an enemy submarine is present)
Move: 2 (3 when supported by a carrier)
Special Abilities
Supported by Carriers: When a destroyer move along with an aircraft carrier, the destroyer’s movement is increased to 3. This pairing is on a one-to-one basis. The destroyer and the aircraft carrier unit must leave from and end up in the same sea zone.
Submarine Disruption: A destroyer cancels the special abilities of submarines. Enemy submarines cannot move freely through a sea zone containing your destroyer. If you have destroyers in combat involving enemy submarines, they attack and defend on a 3. Any casualties of enemy submarines can return fire. Also, enemy submarines cannot submerge while your destroyer is present.
Shore Bombardment: In an amphibious assault, your destroyers may like battleships make a support shot on amphibious assaults on a 2. Each destroyer fires once during the Conduct Opening Fire step against enemy land units in the territory being attacked (the enemy units do not fire back). A destroyer cannot conduct shore bombardment if it was involved in a sea combat prior the amphibious assault.
Battleships
Description: Powerful and nearly indestructible monarchs of the sea.
(This is a revised rule for battleships only, not a new unit)
Cost: 20
Attack: 4
Defense: 4
Move: 2
Special Abilities: All attacks on other naval ships are conducted with preemptive salvos to represent longer-range gunnery. Every combat round they attack in a similar manner. Otherwise they conduct themselves the same as LHTR. These ships take two hits to sink