This is cheating!

Productivity modules are really cheating (free outputs!), and the game was balanced around them. This mod removes the cheats, and preserves the end-game balance. Early game is easier, and there's no simple fix for that.

Why leave lab and mining productivity?

They don't effect the factory layout. There's no cause to make resource patches run out early. Also, end-game lab research improvements are a fun side-objective.