The mod looks and plays great! I always felt the information age was a bit lacking, the new units definitely add to the late game. My only critique would be that some of the new units felt a little op compared to other information era units, but I just changed the combat stats to better fit my liking. But otherwise good job! I've also enjoyed the Civ 5 unit assets like the stealth bomber, I wouldn't mind seeing more of these like maybe the Civ 5 versions of the mechanized infantry and the gunship, or maybe the modern era landship to bridge between horses and tanks along with other ww1 units. And I agree with the above comments, a marine unit would be very welcome. If I could offer a few suggestions myself... The machine gun feels left out in terms of the upgrade line, a more modern looking upgraded unit would be welcome (like the modern sniper as an upgrade to the atomic sniper). It would be cool to integrate that so that it doesn't look odd with all the modern-looking info era infantry units around. Same goes for the recon unit (maybe a special forces upgrade?). It wouldn't have to be much of a combat upgrade, just mostly for cosmetic purposes. Again, great job.
Thanks. When more late game units are added to the other unit classes I am hoping the game will be more balanced. I probably should scale back the current units a bit as you say until the mod is finished.
As for the Machine gun it has been orphaned and I am up for suggestions on what to do with it as I think it is still an important unit historically speaking. I think it should be move back an era as it is more suited to the modern era than the atomic era. I also was thinking of maybe a special unit line that includes machine gun, marine, paratrooper, slinger (mainly because it has a range of 1) and maybe a skirmisher.