Your modpack has completely changed the game for me, made it a much more meaningful experience than the stock version, so much so, that I wonder why this wasn't included in the original game...
Having enjoyed your mod pack through many games, I have a few suggestions you may like.
1. add the new Moar Mortar mod - great idea for a more appropriate replacement for the machine gun.
2. create "guided missiles" as a new weapon - graphically looks like the icbm but is not nuclear. conventional explosive to take out units or attack cities at a distance, does say 100 damage and no fall out and only one tile. add to your guided missile science tree spot. stationary in "missile Silos" can collect many
3. allow sniper and submarines (u-boat too) to enter boarders without restrictions
4. create a new district called "financial district", thus separating the financial industry from the commercial industry... move the vanilla "bank and stock market" to new Financial District. and create new buildings for financial district too - like temple depository, mint, insurance industry, investment bank, mercantile exchange, reserve treasury, and currency exchange. I'm thinking of the Broadway Wonder icon as the Financial District icon...
in the old "commercial district" leave vanilla "market" and create new buildings like Main St Stores, Shopping Plaza, Shopping Mall, Luxury Retailers, Internet Commerce, and so on...
5. consider adding new buildings to the "encampment district" such as Quartermaster, Munitions Arsenal, Defense Advanced Research Agency, Special Operations Command, and so on...
6. consider adding new buildings to the "Education District" such as Observatory, Gene Splicing Enterprise, Isotope Laboratory, Theoretical Augmentation Campus, Bionics Clinic, and so on...
7. consider adding new buildings to the "industrial district" such as Machine Shop, Vacuum Tube Facility, Assembly Plant, Transistor Manufacturer, Computer Manufacturer, Automated Mechanized Plant, 3D Printing Fabricator, Fusion Generation, Integrated Replication Facility, and so on
8. consider adding new buildings to the "city center" such as Cemetery, Fire & Rescue Station, City Council, Outdoor Fair, Park, Guild Hall, Consulate, Public Water Works, School, Planning Department, Train Station, Playhouse, Heritage Museum, Concert Hall, Science Institute, Terrace Housing, Satellite Communications, Fiber Optic Network, Wireless Internet Infrastructure
I suggest so many new buildings to further fill out your expansion of the tech and social trees, especially in the latter game eras where buildings are spars - with that in mind, the building types I listed above would correspond to your later tech's and social's
Having said that, I think some additions could be made to the great people and maybe something with religion but don't know yet... But I don't know if those changes are doable yet...
Anyway, I hope you don't mind my suggestions...maybe you might like one or all. I'm no coder and your work is exemplar! so maybe my suggestions may give back some Thanks.