When I heard about the 1 unit per tile I was so excited.
After just a few games, I'm quite disappointed. Here are my reasons.
(1) I do not enjoy the transport of units over water.
(2) I cannot give "group orders" (honestly don't know how you would implement, but it's really painful to try and move a large army... this is related to #1)
(3) It doesn't scale to the right sizes on the map. I played Shaffer's Earth Map (spelling?) and I had a ballista shooting across the Aegean sea. That kind of ruined it for me.
(4) I can't have "bases" where I keep my army. I hate having to have my army just sitting all over the place, rather in a single place I can look to when a war breaks out.
If I had any suggestions for the developers, it would be to consider movement/storage as a different thing than actual combat. Maybe an easy way to deal with this would be to allow for unlimited stacking with the following limitations:
(1) For each unit within a square, combat effectiveness decreases by some factor (maybe even 50% each time).
(2) Maybe going back to a Civ-I style penalty, you could have multiple units destroyed in a single attack.
The key here would be, you can stack as many units as you want when you aren't fighting. You can move them as a group, and you can store them (at a base) as a group, but don't think about fighting that way. This also adds an interesting tactical approach to the game because you can try a "surprise attack" on a country and try to destroy as many units "in storage" as you can before they can get on tactical footing. Also, during a war, you could have missions to try and destroy units in-transit if possible.
And please, before you just rip apart my ideas, I recognize that what I'm proposing has some big holes in it. But I think it would be an interesting starting point to experiment with.
-- SJN