Factory needs a very serious buff. Possibly to increase the amount of blocks per production? 1 is simply not nearly enough.
Defense in general needs a buff also, especially absolute value defense, which is basically useless.
Defense is currently useless to upgrade, so something needs to change to make defense a viable option. The absolute value defense upgrades are actually worthless, whereas the other upgrades are just grossly under-powered vs spending on offense.
 "The Perfect Tower"){kind=icon}
 "Kingdom Rush Frontiers"){kind=icon}
 "Cursed Treasure 2"){kind=icon}
Probably yes. Not very soon though - we have other plans for near future ;)