What changes to base-game setup does Proliferation make for Unity, Zeth and Kt'Zr'Kt'Rtl?

Question

Accepted Answer

Give the Zeth a starting colony, and let Unity choose one of three colonies and upgrade it for free. The designer says the change Proliferation made to the Kt'Zr'Kt'Rtl setup was a mistake, so do not apply it.

Sidereal Confluence

What changes to base-game setup does Proliferation make for Unity, Zeth and Kt'Zr'Kt'Rtl?