I haven't seen the singleplayer except in videos, but I've been playing the Beta since the end of June and I can't think of too much more that could be tweaked, except for:
- Random starting locations on the campaign maps.
- Aerial Mines are only really good as Anti-Dragon weapons, and hence are not worth their 20 Research Point cost in single-player.
- The unit buy screen tells you how much you've spent, and I'd prefer to know how much you have remaining.
- I'd like to see fewer "Transport's Range/Damage increased/decreased" cards and more "Transports on a certain country cannot move.
- There needs to be a way to sell or trade in cards you don't have a use for.
- Extra Mouse Button 2 has "Dragon Morph" permanently assigned to it.
Nothing really major.