The progress feels mostly flat, your only progress coming from "now you have an extra production building" Drones are convenient, but technically do nothing for this. If you just leave your buildings for a while, then run your mouse over the resources, you've done the work of a thousand drones.

The idea has potential, I originally assumed there'd be building adjacency bonuses and terraforming for optimization/strategy, but right now it's not really doing it for me

I don't feel like I wasted my time, though, so the review is positive. There's worse games out there.