Definitely need some way to do something about useless/old items. Discard/Destroy would be ok but Sell would be better. Would be nice to be able to recoup at least some money.
Also, the cheat to decrease the cost of upgrades does not entirely work. The price appears to be less, but if an upgrade with the cheat costs 540 and you have 550, it will not let you purchase the upgrade. They seem to reduce your current gold by the unreduced price, as well.
The game's fun, but clicking on each battalion to use their special abilities is tedious. Maybe put in some hotkeys to select battalions. At least I haven't found any way to select battalions without clicking on their icons.
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 "Battle for Darkness"){kind=icon}