First of all I have to thank you for the excellent job you are doing. I have been playing this mod for over a year now and it is currently very polished and highly entertaining.
I want to tell you about my experience playing the mod (to date) since some element may be useful.
1. Game speed: 150 turns still seems like a long game to me. It is difficult to finish in a day, less in a working day. I think a speed of 75 turns would be very useful. I myself have moderated my game so that the fast speed is 75 turns. I can start and finish a game at night on a weekday with no problems. It is possible that a speed of 50 turns is also viable.
2. Science: It happened to me that every time I played the mod, before reaching the final turn, I had already studied ALL the technologies. I like that each game is unique, and that each technology studied has an opportunity cost over other technologies that I will not be able to study at the end. In my 75-turn mod this happens perfectly as it only affects the time limit and not the speed of the game.
3. Food: It has happened to me several times that I reach the population limit in each of my systems and food production technologies no longer make sense (except that which converts food into industry). It seems to me that the planets should have a higher population limit; that several of these technologies have a greater impact on the limits of the general population or; make the population growth equation "harsher".
4. Influence: I find that using "Praise" to minor civilizations a bad waste of my influence (especially if I play with Emperors Will). It's easier to invade them (or never even touch them).
5. Diplomacy: Diplomacy between Mayor Empires is too cheap. Declaring war or peace should be serious business. Not to mention an Alliance. The Alliances add the points for the victory by Score; which makes them absurd, an alliance of weak empires outperforms a very strong Empire. I believe that any relationship between empires should be very expensive. Imagine in the real world what it is like for a country like the United States to declare war on a small, dictatorial country like Afghanistan. Every citizen must be convinced that war is the right thing to do. An Alliance is similar, convincing all Europeans to form the European Union is not something that is done as usual. All large diplomacy operations should have a fixed cost per Inhabitant, and those that require acceptance (such as an Alliance) should also cost. I think it's okay for the points of all the Alliance members to be counted towards the victory by points, but if and only if forming the alliance is a complex issue in itself.

These are the main points that come to mind today. I hope that some of these elements will be useful to enrich your development process.

From already thank you very much.