Some experimental mode where you won't actually use any money or produce anything, just so you can visualize how long until everything explodes and see the total cost of renovation would be nice
If the units stayed on the battlefield and patrolled or maybe you could spawn in multiple at once rather than clicking each 10 times, then they would be much more worth it
A little addition would be nice,
The same visual that upgrades have for new units, as I would like to see how long until I can make a nest from solid queen production