hi devs, just a thought of mine , maybe add buildings which produce special units to go into the special units category like loot units except unique from missions. You could unlock these buildings at higher levels and the units could be made expendable so people don't build up a huge army of special units. it would be cool if it spawned a batch of random units each with different stats and occasionally a rare "super unit" not unlike gold units. However of course, this building would have high upkeep and you could limit a player to having just one of these buildings.
The building randomly creates new units? what if the player doest't want the extra upkeep caused by them? And also if its a destruction unit, many won't even notice the unit if they got attacked and lost soon after.