Current in game via Sakkra Uber: Jungle (from swamp) and Mrrshan Uber: Grasslands (from Desert). Upcoming Uber planets include Inferno (Silicoid from Volcanic), and Cavernous (presumably Klackon/Arid).

First: it seems Humans, Khanate, Darlok, Psilons, Alkari and Meklar are not getting Ubers. I don't think every race needs an Uber but I'd suggest for at least half the races, so - at least one more - perhaps Alkari can transform Ocean into Uber:Archipelago or Bulrathi Tundra into Uber:Taiga. It's one of the few things in game that leads to different play currently (but see next point)

Second: Ubers need to work for two planets. Not one. Mrrshan's Grasslands should be terraformable from Desert and Arid. Sakkra's Tropical from Swamp and Ocean. Unfortunately, seeds can be pretty random so played an MP game where Sakkra had a bunch of swamps to choose from, but I (as Mrrshan) had only two lower quality desert planets.
Additionally, this creates competition for Uber planets if Mrrshans are going for Desert and Arid and Klackon's are going for Arid/Barren.


Third: Races with the Uber trait should start out on homeworlds that are the base planet. Sakkra on Swamp, Mrrshan on Desert, Silicoids on Volcanic, Klackon on Arid. Only Humans and Psilons should be starting on Terran.

Last, and relatedly, If Pirates can inhabit Asteroids, than at least on of the races (Khanate) should have the ability to do so as well.