There are some games that died on my opponent's turn and they don't close it out so they're just sitting in my "Their Turn" queue. How can I get rid of or delete those old games?

I think adding visibility bonuses and penalties for terrain might be an interesting addition.

Hills + Mountains = Visibility range +1
Valleys + Forests = Visibility range -1

Similar to the effect fog and bad weather have on visibility.

Most of the other suggestions sound great too.

This comes down to personal tactical style. But one suggestion it to cherry pick vulnerable units that could do well with a half-track like artillery, or units that need to get close to the action quickly like Pioneers or Grenadiers. Also, create a specific group of mechanized units for fast, deep s...

I discovered that hitting the "Zzzz" key aka "sleep one turn" deselected aircraft without wasting the turn. It's very simple and easy to do! Thanks for the responses

This could also help give a little more strategic importance to hills and certain terrain aside from the movement/defense bonuses.

Is there another way to check the mission objectives without having to wait until the end/beginning of your turn? I've clicked every button there is and can't seem to find it.

Whenever I select an aircraft it is really difficult to deselect it if I don't move it. I usually have to click on a hex outside of the movement range. Is there an easier way to deselect aircraft?

I was battling it out near Kiev and each time my infantry units took position on a hill I expected their sight range to increase, probably from all those years of playing Civ. That's when I realized it might be a nice feature to have certain units gain a sight bonus or lose a sight bonus depending o...