Here are my notes on the empire cost changes in 3.0:
code:
--------------------
Empire Cost Changes:
--------------------
* Lowered value of "Advanced Power Conservation" to 900 points.
* Lowered value of "Supply Guzzlers" to -700 points.
* Lowered value of "Natural Merchants" to 1500 points.
* Renamed "Propulsion Experts" to "Transcendental Navigation" with a new
description, since it has a bizarre disproportionate effect.
* Added a new "Propulsion Experts" trait, which is a new racial tech
area that provides better propulsion components.
* Renamed "Mechanoids" to "Plague Immune" and dropped cost to 400 points.
* Physical Strength values lowered.
* Intelligence costs tweaked. "Dumb" races get more points back.
* Cunning adjusted per PvK Balance Mod.
* Happiness and Environmental Resistance values slashed, but Happiness
ranges increased, in light of research into lack of effect of racial
Happiness.
* Reproduction maximum increased. Now limited only by cost.
* Aggressiveness and Defensiveness adjusted per PvK Balance Mod.
* Political Savvy adjusted per PvK Balance Mod.
* Resource extraction aptitudes left as in Proportions 2.5.3.1.
* Construction Aptitude adjusted per PvK Balance Mod, except positive
threshold. Also extended allowed minimum range to 25.
* Repair Aptitude adjusted per PvK Balance Mod, with increased min and
max values.
* Maintenance Aptitude left as is, because it uses SJ's base-100 system.
PvK