Hello,
I've the following two simple Ideas I think would improve the game some how:
After Fleet Battles create with a chance of x% an Anomalie, where the battle has taken place:
most often this anomalie will hold just some money depending on the value of destroyed ships, sometimes a new tech if one of the ships had a tech you have not allready, and really seldom a 1% bonus for all your ships in weapons or hitpoints or defense...
The second would be to make the ship costs flexible in the same way as research costs:
which means that you can select at the start of the game how expensive ships should be in the same way you can set the tech rate...
When ships are more expensive tiny and small ships will get built more (I nearly build only ships > medium now)...and large and huge ships will become something much more valuable....