Rebalances Tier 4 modules to be more difficult and interesting. T4 modules can only be crafted on Aquillo and have more complex recipes (T4 Productivity requires biter eggs and pentapod eggs).
Also rebalances module downsides for tier 2,3,4 to be much more significant. Power costs greatly increased. Slowdown of productivity increased. Quality now gives less slowdown per level to incentivize using higher tier over lower higher quality. Also makes beacons require more power with quality not less so they are not "free" powerwise in the late game.
Module effect changes can be disabled via mod setting as well as recipe changes.