We will do couple unit changes for Macedon mostly and perhaps move on with others in the future after the release of the mod. Units rosters will stay intact for most, although any pikemen units will be removed from factions rosters.
We want players to feel absorbed in-game from year to year, and we will be making sure the general importance becomes critical, giving a much fun-to-play experience gameplay compared to vanilla or any other overhauls, with simplistic changes, rather than put to much changes. The Unit max recruitment per turns will be cut by half, leaving also the technology research time increased by half. The Campaign will have a 24 turn per year scenario this might sound a lot, because it is.
Currently, Alexander will have a complete unique model, including his famous lion helmet.