I disagree as to balance - at the very least I would trim down the number of transports, subs, destroyers, or cruisers and add one slot for tanks.
I’ve asked HBG what units he sells the most of, the answer is tacs and land units (tanks, mechs). People use LOTS of those in the 1940 and variant games, including global. It is undeniable that A&A has a global focus.
For those few that want to play naval variant games, like Tall Paul and myself, the extra ships are nice - but honestly, given supply and demand, it is much easier for the minority that plays naval variants to pick up extra ships from HBG than for the majority who play A&A based games to pick up extra tanks, mechs, etc.
Here are some prices:
Land Units:
Tank $1.95
Truck $0.75
Mech $0.35
TD $1.05
Compared to:
Naval Units
Carrier $0.25
Battleship $0.40
Destroyer $0.25
Submarine $0.25
It won’t be the end of the world for FMG to kill one destroyer, sub, or transport slot and give us 6 more tanks and 6 less of whatever ship he axed. For those that want more of the ship, they can always buy more. However, if you want to buy more tanks, you are out of luck - HBG sold out in a couple days…