Eh, just something I was thinking about.
1:I think that unit design should be a savable process, so if you have a human unit you created for single player and use it for your Human Soveragn online.
2:Now I know this most likely isn't easy, just something I thought of after playing Civ4, But to save your server with friends, and start it at another date would be a nice feature, would be great to see this in future updates.
Cause to be honest, who wants to create a unit everytime they go online? and who would honestly want to wait for the guy? it's just something I thought of to make online play a bit easier without constant "Hold on making a unit"
and as for the server thing, I used that feature a lot on Civ 4 and just made it easier to play a long game with friends for like a week or longer.