They need to add some really long/difficult techs to research that dont unbalance the game but give you some small advantage that is still worth pursuing during endgame. Otherwise once you get all the techs, what then? Your research worlds get torn down and rebuilt as money worlds. At the very least they should add an endgame "research to money" endless tech so you dont need to rebuild your research worlds.

I've been saying this for a while.

I come from Gal Civ 1, and while I understand it had years of polish Gal Civ III has not, it feels like 40% of the tech tree is just ... gone.

1d - 2 d - 3d - 4d phasing

teleporters

I keep saying I'm going to fire up Gal Civ 1 and play a game just so I can flesh out a more complete list of how we've gone backwards in technology while advancing into the future.

Nothing like losing options in sequels.