Here some of the new feature i want to see
Forge Tools: Ive always wanted to mod but never had skill. In Galactic Civ, you can make new ships design which was fun and make factions.
Ship Forge: Make Ships and add weapons type etc.
Planet Forge: Make own planets, create type, how will it look like.
Research Forge: Make new research ideas for a custom faction
Artifact Forge: Create new artifacts and bonuses. I also like the idea of a artifact that has a negative impact on a faction.
Faction Creator: Create your own factions and add them to SOASE
Land Troops on Planet. Land soldiers on planet to try to take it over though you cant control them. It will be to much micromanagement.
New Defense: What i really hated about SOASE is like each faction only gets 1 gun platform type.
TEC: Missile Platform can attack mutiple targets but not up close. Autocannon Platform can attack close but not far. Laser Platform basic and medium range. Gauss Platform same range but longer reload.
Advent: Plasma Cannon, large damage radius with splash but long reload, Rapid Fire Laser Platform deals low damage but fast attack and medium range.
Vasari: Pulse Platform, medium range. Wave Cannon large damage radius but long reload.
I also think that you should have the ability to colonize space junks, asteroids belts, and plasma storms. Colony ships can create an orbital platform which allows miners to live there. 500 pop cap with 2 fighter squadrons, basic weaponry and 3 free frigates. Since colonizing a plasma storm disables strike craft, you get 5 free frigates.
Thats all i can think for now