Amazing expansion, everyone involved should be proud.
Bug: The Iconian building Precursor Library which gives 12 TP is coming up short when placed on a research bonus tile. Instead of a bonus 12 TP when placed on a 100% bonus it is only resulting in a bonus 10 TP. When placed on a 300% bonus tile only 30 bonus TP are given when it should actually be 36.
Problem: Iconian economy IMO needs some serious balancing still. Their buildings could use a bit as well. To sum it up their buildings while powerful do not make up for the massive loss of bonuses from their tech tree compared to the other races - especially economic. Yes the 50% economy building is rocking but in the late (on larger maps) game that barely matches other races minimum 45% economy bonus that is in their tech trees. Plus the building takes up a precious planet tile and only one can be built; after that Iconians are stuck with seriously substandard buildings.
Solution 1: Add back the three higher forms of governent to the Iconian tech tree.
Solution 2: Add a 10% economy bonus to each of the three levels of economy buildings.
Solution 3: Remove the one-per-planet restriction from the 50% economy blding, and make it untradeable tech.
In addition the Robotic Farm needs a serious tune-up (say 4 food for 2 bc) or an upgrade to it that gives 5 or 6 food for the same upkeep.
The upkeep cost of the Dream Conclave is a bit silly.
A cool race with a very different feel and playstyle though.