I new to the Galciv 3 forums so I'm not sure where we are in the development of the game.
Do the suggestions being posted have a chance of being implemented or is it more of a wish list, like we saw constantly in Galciv 2?
I haven't read enough to know everything that's been suggested so let me just add that I hope the new game will allow mutual destruction. A very powerful ship with just 1 hit point remaining shouldn't be able to keep surviving battles even when it takes damage.
Also, and I suggested this way back for Galciv2, when the tech tree runs out, instead of having nothing to research, there can be research for weapons and shields that just give a small percent bonus to your ships. That way you don't have to trow away all the research infrastructure you created.