I have a question: the programming is different regarding the movement and behavior of a LOTR BFME battalion. How do you plan to modify that without touching the engine?

2, I have them for the Hylians in Hyrule Conquest: Revival.

That section can expand vertically to accommodate the extra stats (or there could be a vertical scrollbar). The Historical section can shrink vertically to give room, since it has a scrollbar. 

I was thinking that because it seems you'll need way more stats for some units (for kinds of damage, range, spread, etc), then icons would give you space for a 4th column, if not also a 5th one.

You're assuming it's a game, and the problem is that it would stop being fun. Games have internal logic; you don't expect that much realism. Games have a fun curve.   Why does realism sometimes harm the experience? Fun Curve: In video games, extreme realism often makes controls worse. Selection of Details: The human brain ignores many things. An excess of realistic details can distract from the narrative. --- Not to mention that it ruins the experience.