I personally think that they should complete the units needed for the base setup for each country. We have a lot of advanced subs, bombers or heavy carriers and battleships out there, but they don’t get that much use in each game.
Let’s face it, ANZAC is not building heavy carriers anytime soon and the USSR has other tech priorities than to research heavy battleships.
Most players will have already adapted or painted what they need for their initial set-up, but having a complete set available would especially benefit new players.
HBG seems to be preparing more and more miniatures for the 1914 game, but new WW2 sculpts are getting rare.
A line of fast battleships could also be nice, as this is the only unit that we have resigned ourselves to use a colored chip to differentiate. Then again, we don’t use them that often either.