“The War Game” and others address this by letting you buy all the units for every team, with different costs. So China pays 8 for tanks, Most powers pay 6, Germany 5 etc. This makes things more complex, but also more flexible.
Also note that, as a weight-saving measure, battlecruisers sometimes carried fewer main gun turrets than battleships. British practice in the first two decades of the 20th century was to build battlecruiser counterparts to each battleship class, typically with fewer main guns, lighter armour, greater length and so forth.
Is there something wrong with the pictures on the first couple of pages of this thread? I only see a placeholder, generic image icon where the pictures should be. :?