Awsome ideas.
Would you make that both values (fallof offset and falloff per tile) can be set in Global defines? It would be easier to balnce the changes if there would such need. It would be cool to apply similliar settings to bombers - bombing mission - the farther the object to bomb/strike is - the less damage would be done - it has also sense - you need to carry more fuel and less bombs. Also this air superiority option from DCM - that fighters attacks fighters in other city seems to me to much powerfull. It would be cool to weaken it with this falloff options too (of course after we add to the source code merged mod wich contains DCM).
I love the idea with winter terrains. It'll be all the time on the map, or do you want to change the look of the terrains in the winter/spring? I disliked the second option in RtW - not that this is cool idea, but it slowed down pc so much that during winter months when I pressed end of turn, I could go to kitchen and make tea
The second option adds more flavour, but if it'll slow down much old pcs, i will definitly stay with option number one if there isn't possible to make the second option fast and efficient. The first also could have greater impact on food and hammer production - so Canada won't turn into superpower, and Soviet Union having more cities than other players still won't be so much powerfull and Siberia won't change into very habitted place on Earth).
Similliar promotion could get Finland - adding extra defense and speed in winter terrains.
The terrains graphics aren't the problem. I can work or it - I should present something to the end of week.
For MaginotLine - I don't think that unmovable unit is good idea - it would get obsolete, so more classes and units should be done in xml - I would like to stay with good idea with making 'fort' promotion, not available by traditional experience points. This way anything with this promotion (artillery (it would be cool to bomb adjuscent tiles with DCM merged in), machine gunners I-II, infantry I-IV, AT Infantry I-II, Jaegers I-II, Mountain Infantry I-II, Medic) could be used in Maginot Line or Zigfried Line or Mannerheim Line, Atlantic Wall or any other bunker systems / pillbox, strategical city (like Leningrad, Moscow, Stalingrad, Gibraltar), etc..
Yeah reinforcement should be done - all units dies after certain amount time in battles. The Ai could be forced to do that with scripts - maybe even a little bit cheat (but of course not to offten - max 2 fresh units per turn could be added for France, and max 1 for rest countries) - that if there'll be such need new units with the promotion 'fort' could appear in plot x/y