7. Backup has arrived, this is very annoying when I hear backup has arrived and it's just trade ships or other non-combatants.
This will be improved.
8. Cultural spread doesn't seem to shift properly. I build some centers on my border planets and while I did have influence lines spreading from that planet the planets behind it were still the enemies color.
I haven't notice this behaviour yet. Thanks, we'll look into it.
2. Have alternate zoom keys if they're aren't any. Nothing on the right side of my keyboard did anything with zoom.
In the options menu you are free to map the keys as you wish

4. Have an option to disable fighter icons, Even on small maps I'll get anywhere from at least 6 to 24 squadrons, it's hard to target a specific ship unless I zoom all the way in.
We are looking into various solutions to many icon-related problems.
The green line I see when pressing alt is a little annoying.
Can you take a screenshot please?
Thanks!