I have a few ideas for mods I don't know if they can be done or not, others can also put their ideas here.

 Batallions: Normal ships(not capital ships) are made in groups, just to look good, their firepower is dispersed and they have a shared shield and hull hitpoints.

 Water planet type: A new type of planet that can be colonized with the technologies:

TEC: Submerged cities, water adapted shield generators allow colonies to be built under water.

Vasari: Artifical landmass, new technology allows energy to be converted into earth allowing aquatic planets to be habitable.

 Advent: Floating Cities, gravitational fields allow entire cities to float on water, allowing colonization of aquatic planets.

 Phase jump changes: The window to phase jump is only open for a few seconds and looks like the hyperspcae window in stargate(like a thin cloud with sparks). The wierd "tail" surrounding a ship in phase space is replacedby a short section of the hyperspace tunnel from stargate a bit in front of the ship to a bit back of the ship(and o course in the middle.).