I just made my own minimod, but I am quite new at RTW modding, so its nothing big.
-Added infantry generals to a lot of factions (they are a lil bit OP)
-Added a lot of new zones to the original map (you'll notice this one quickly)
-Some character traits and ancillaries
-Some new buildings (buildings for every merc in the game except elephants, so they got a "home" where you can retrain them)
-Some few units (one which failed horribly *cough* thracian general *cough*)
-Night battle to normal RTW (I think you need RTW Gold for this one, I might be mistaken)
-New Victory Conditions for all factions
-New maps (subpar, but they were done quite quickly, so not much effort put into them)
I've set it up for its own mod map, so all you need to is to make a new folder called EC (this is my working name for the minimod) in the RTW folder, copy paste your data into it, then add my files to the RTW folder. They should automatically add themselves into the EC folder. Use a modswitch, by adding "-mod:EC" either to the launching settings of Steam, or to RTW.exe file if you are not.
Link for file: