When playing as the Yor, I notice that there are no techs in the Planetology branch of the Colonization tech tree besides... well..... Planetology (first one in branch). This tech also gives two terminating improvements instead of one (though this may be intended).

This means that the Yor, and probably all synthetics, don't have access to most of the terraforming techs, as well as Extreme Colonization, Atmospheric Cleansing, and their corresponding focus techs. I know Yor don't need Extreme Colonization because they're Adaptable, but again, there's still Atmospheric Cleansing, Colonization Focus, etc. Also, Synthetics that aren't Adaptable would still need Extreme Colonization. Actually, I haven't tested this, but does the Yor's Adaptable trait work anymore now that Extreme Colonization is not part of their tech tree? Something to look into...