As you could see yesterday, Admin hinted at some changes in the game. The first thing will soon be a possible upgrade of the air factory to q6 quality. The price of upgrading from q5 to q6 will cost 520 gold and it will be possible to use 8 workers in it. The second change will be related to the addition of another strategic building, which will be related to the production of workers. It remains to be seen when the Admin will present this plan to us. However it will be more interesting than the current situation.
https://www.erevollution.com/en/strategic-buildings