An issue that came up with custom races in GC2: is there any plan to address one-off buildings for races sharing a tech tree? For instance, if I played a custom race using the Thalan tree, I had to make sure no other race in the game used the same tree or I wouldn't be able to build a Hyperion Matrix - the AI player went first and rush bought it the first turn, so the building was unavailable before I even had a chance to go. Other races had similar issues with early buildings.

In GC2 it was avoidable even on large maps because you could fill the map with races while never having a tech tree repeat. That won't be an option if you want to fill a GC3 map.

Death Furnaces are still in the game but being moved over to the Ideologies. Ill let you guess which one.

That's good to hear, but I'm not quite certain what to think about moving the Death Furnaces to the Ideologies.

On the one hand, the move make sense. Any malevolent race with a basic understanding of Dark Energy could come up with such an improvement. The Altarians, strangely enough, would probably have the easiest time, due to their innate ability to manipulate Dark Energy.
On the other hand, the Death Furnaces have always been something unique to the Drengin. Giving the other races "easy" access to them feels weird to me, because it goes against the previously established lore.

Perhaps that's a hint toward race-specific Ideology choices? Not to the same degree as tech trees, but a few replacement choices that fit better into each race's tech tree?

That's good to hear. My main concern is about ones available on turn 1. Or even turn 10.

When I shoot them out of my torpedo tubes into the cold,dark,vacuum of space.....(sorry did I say that out loud?)