These are just the changes, some parts of the city improvements haven't been changed such as the Advanced Extraction's effects. Vanilla stats: https://endlesslegend.gamepedia.com/City_Improvements

City Hall: Now adds 2 Militia (0)

Empire Mint: +10 Dust on City, cost 75 Production
Dust Dredger: +4 Dust on Terrain with River in Summer, cost 75 Production
Dust Filtration: +4 Dust on Terrain with Sea or Lake during Summer, cost 75 Production
Dust Refinery: +50 Dust on City, cost 400 Production and 10 Glassteel
Dust Depository: +3 Dust per Pop on City, cost 800 Production and 10 Glassteel
Dust Transmuter: +4 Dust on exploitation, cost 800 Production and 10 Glassteel
Dust Revitalizer: +15 Dust on District Level 2, cost 800 Production and 5 Mithrite
Advanced Extraction: +4 Ressource on Luxury Ressource Deposit, 7 City Upkeep, cost 800 Production and 2 Mithrite
Town Criers: +100 Dust on City, cost 800 and 5 Mithrite

Seed Storage: +10 Food on City during Summer, 1 City Upkeep, cost 75 Production
Husbandry Center: +3 Food per Pop on City, 1 City Upkeep, cost 150 Production
Fish Farm: +5 Food on Terrain with Sea or Lake during Summer, 2 City Upkeep, cost 250 Production and 2 Glassteel
Irrigation Networks: +5 Food on Terrain with River during Summer, 2 City Upkeep, cost 250 Production and 2 Glassteel
Public Granary: +30 Food on City, + 3 Food per Pop, 2 City Upkeep, cost 250 Production and 5 Glassteel
Plow Factory: +3 Food on exploitation, 4 City Upkeep, cost 400 Production and 10 Glassteel
Refrigeration Plant: +3 Food per Pop on City, +50 Food on City, 7 City Upkeep, cost 600 Production and 5 Palladian
Subterranean Gardens: +10 Food on District during Winter, -100% Life loss during Siege on City, 7 City Upkeep, cost 600 Production and 5 Palladian
Fertilizer Plant: +6 Food on District, 7 City Upkeep, cost 600 Production and 5 Palladian
Hothouses: +3 Food on exploitation, 7 City Upkeep, cost 600 Production and 5 Palladian

Mill Foundry: +10 Industry on City, 1 City Upkeep, cost 75 Production
Lumber Mill: +25 Industry on City, 2 City Upkeep, cost 250 Production and 5 Titanium
Apprentice Registry: +2 Industry on exploitation, 2 City Upkeep, cost 250 Production and 5 Titanium
Canal System: +15 Industry on City, 2 City Upkeep, cost 250 Production
Canal Locks: +3 Industry per Pop on City, 5 City Upkeep, cost 500 Production and 10 Titanium
Production Line: +75 Industry on City, 7 City Upkeep, cost 600 Production and 5 Adamantian
National Craftworks: 15 City Upkeep, cost 1200 Production and 10 Adamantian
Automated Production Line: +2 Industry on exploitation, 7 City Upkeep, cost 600 Production and 5 Adamantian
Mining Rights: +1 Resource on Strategic Resource Deposit, 7 City Upkeep, cost 600 Production and 5 Adamantian

Glory of Empire: +5 Influence on City, +1 Influence per Pop on City, 3 City Upkeep, cost 250 Production
National Museum: +2 Influence on District, +1 Influence per Pop on City, 4 City Upkeep, cost 400 Production and 10 Titanium
National Arena: +50% Influence on City, 8 City Upkeep, cost 800 Production and 10 Titanium
Aura of Empire: 15 Influence on District Level 2, +1 Influence per Pop on City, 10 City Upkeep, cost 800 Production and 5 Hyperium
Customs Ministry: +7 Trade Routes Max on City, 40 City Upkeep, cost 1600 Production and 10 Hyperium
Arena of Champions; +100% Influence on City, 20 City Upkeep, cost 800 Production and 5 Mithrite
Octagon: +20 XP per Turn on Governor, 40 City Upkeep, cost 1600 Production and 10 Mithrite

Stronghold Architecture: +2 Fortification Recovery on City, +100 Fortification on City, +3 XP on Army, cost 75 Production
Infantry Cantina: +2 Max unit slots on Militia, cost 75 Production
Imperial Kennels: +200 Fortification on City, +5 XP on Army, cost 400 Production and 5 Titanium
Military reserves: +4 Fortification Recovery on City, +4 Max unit slots on Militia, cost 250 Production and 2 Mithrite
Defensive wards: +10 Fortification per Pop on City, cost 250 Production
Conscription center: +100 XP when Recruiting a Unit on Units, cost 250 Production
Army manual: +200 XP when Recruiting a Unit on Units, cost 600 Production and 2 Palladian
Materials Hoard: +10 Fortification Recovery on City, +100 Fortification on City, cost 250 Production
Medical Center: +10% Health Regen on City, + 10% Ally Health Regen on City, cost 250 Production
Inoculation Center: +15% Health Regen on City, +10% Ally Health Regen on City, +200 XP when Recruiting a Unit on Units, 5 City Upkeep, cost 800 Production and 2 Mithrite
National Military College: +100% Attack on Units, cost 600 Production and 2 Palladian

Public Library: +10 Science on City, 1 City Upkeep, cost 75 Production
Geomic labs: +3 Science on Terrain with Science, 1 City Upkeep, cost 75 Production
Center of minerology: +3 Science per Pop on City, 1 City upkeep, cost 150 Production
Alchemy Workshop: +40 Science on City, 2 City Upkeep, cost 250 Production and 5 Titanium
Advanced Alchemy Laboratory: +6 Science on District, 4 City Upkeep, cost 400 Production and 10 Titanium
Cryometric monitors: +150 Science on City, 8 City Upkeep, cost 800 Production and 10 Titanium.
Large-scale aquatic center: +6 Science on Terrain with Sea or Lake, 2 City Upkeep, cost 400 Production and 2 Titanium
Hydromatic Lab: +6 Science on Terrain with river, 2 City Upkeep, cost 400 Production and 2 Titanium
Imperial funding: +3 Science on exploitation, 7 City Upkeep, cost 600 Production and 5 Adamantian