Well as a modmaker, I'd love to hear the ideas
I'd probably have added a unit with 0 defense but can attack, but with 13 new units I have alot of things to do so more new units are lower on the list than they were.
However, about the unique tech tree. I definately think it should have been a possability added to the game, but I'd settle for the civ-specific function to be on things like buildings and governments in addition to units.
But you could do it with the units reasonably easily. Just Copy the unit, make the two units civ-specific, but make one come available with one technology and the other available with a different technology.
It would be far easier than adding a new unit because you could just skimp and leave all the civilopedia entrys alone and stick with the same graphics.
The best idea would be that they all appear at once when the tech is researched (easier to do), but alter their stats. So for instance Japanese Swordman would have 4 attack while everyone else gets 3, the French get +1 and +1 attack gunpowder units...you could basically supplant the UU system entirely and make the game far more civilization-centric!
Hmm...you know, I really like that idea. Gotta have a good base to work off of first, so I'll just work entirely on the LWC mod until it's filled itself out nicely.
But hey, I'd love to hear what you anthropolgists think about which civ should have what specialtys. Example: America has additional attack on aircraft, England has additional attack and defense with ships (not applied on modern ships), France has a bonus on saltpeter using units, Germany gets a bonus on tanks, etc.