So what we currently have is a wall of text with no proof of much, if any, progress. We have words, but words are wind, especially with Roman mods. No offense but when one sees a new thread for a Roman mod created by a person who presumably has no modding experience as he's a Pitchfork on the forums they ask these questions. As it appears you have a researcher and a coder, there's not going to be any meat or substance to the mod. What I'd recommend is you put the project on hold until you known you can assemble a team, show your work, work on a mod to gain experience, and most importantly make yourself known. There are many, many potential modders who fail because instead of playing in the kiddie pool they dive from the 50 foot ladder into the deep end and drown. Please, don't drown, it makes a mess, especially when you flounder. I'd just give this a break, lock the thread, and build up a solid idea, and content.
P.S: The Romans you show on your cover photo are imperial Romans of about 50-100 A.D, not Republican.
-Signed,
A modder who's drowned himself three times.