I've never been happy with game pacing. I've read the comments in v1.90 feedback and decided to have a go at modding PacingDefs.xml and came up with this:
<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
<PacingList
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="../Schema/PacingDefs.xsd">
<PacingGroup>
<InternalName>GamePacingOptions</InternalName>
<Pacing>
<PacingType>VerySlow</PacingType>
<Stats>
<EffectType>Growth</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>-0.15</Value>
</Stats>
<Stats>
<EffectType>PopulationToProductionMultiplier</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Multiplier</BonusType>
<Value>-0.35</Value>
</Stats>
</Pacing>
<Pacing>
<PacingType>Slow</PacingType>
<Stats>
<EffectType>Growth</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>-0.08</Value>
</Stats>
<Stats>
<EffectType>PopulationToProductionMultiplier</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Multiplier</BonusType>
<Value>-0.15</Value>
</Stats>
</Pacing>
<Pacing>
<PacingType>Normal</PacingType>
</Pacing>
<Pacing>
<PacingType>Fast</PacingType>
<Stats>
<EffectType>Growth</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>0.05</Value>
</Stats>
<Stats>
<EffectType>PopulationToProductionMultiplier</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Multiplier</BonusType>
<Value>0.15</Value>
</Stats>
</Pacing>
<Pacing>
<PacingType>VeryFast</PacingType>
<Stats>
<EffectType>Growth</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>0.1</Value>
</Stats>
<Stats>
<EffectType>PopulationToProductionMultiplier</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Multiplier</BonusType>
<Value>0.25</Value>
</Stats>
</Pacing>
</PacingGroup>
<PacingGroup>
<InternalName>ResearchRateOptions</InternalName>
<Pacing>
<PacingType>VerySlow</PacingType>
<Stats>
<EffectType>TechInflationExponent_All</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>0.02</Value>
</Stats>
<Stats>
<EffectType>TechInflationMultiplier_All</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>0.05</Value>
</Stats>
</Pacing>
<Pacing>
<PacingType>Slow</PacingType>
<Stats>
<EffectType>TechInflationExponent_All</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>0.01</Value>
</Stats>
<Stats>
<EffectType>TechInflationMultiplier_All</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>0.02</Value>
</Stats>
</Pacing>
<Pacing>
<PacingType>Normal</PacingType>
</Pacing>
<Pacing>
<PacingType>Fast</PacingType>
<Stats>
<EffectType>TechInflationExponent_All</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>0.00</Value>
</Stats>
<Stats>
<EffectType>TechInflationMultiplier_All</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>-0.02</Value>
</Stats>
</Pacing>
<Pacing>
<PacingType>VeryFast</PacingType>
<Stats>
<EffectType>TechInflationExponent_All</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>-0.01</Value>
</Stats>
<Stats>
<EffectType>TechInflationMultiplier_All</EffectType>
<Scope>Global</Scope>
<Target>
<TargetType>Colony</TargetType>
</Target>
<BonusType>Flat</BonusType>
<Value>-0.03</Value>
</Stats>
</Pacing>
</PacingGroup>
</PacingList>
.... and of course, like with so much else I actually wish to mod, It does not and will not work.
PopulationtoProductionMultiplier, TechInflationExponent_All, & TechInflationMultiplier_All are not in the enumeration.
Devs, would you please, if it can be done without the extra hassle of recoding the game engine, expand and make open ended the .xsd lists of "which" can modify "What" and "What" can be prerequisite to "which". Modding, as open as it is with the .xmls readily editable, is still to limited to fully tap community innovation.