These problems are known. Here there are some of the changes I've proposed in the developers' forum, what you think about them?
"- Add agrianian javelinmen to macedon
- Add other 2-3 cavalry unit to the macedonian faction [one light, one missile, one heavy]. I noticed that the macedonian seems to be the "cavalry faction" among the successor, so i think we should characterize them more, since at the moment there are no particular reason to play with them. We could use the alex models. The new units would be prodromoi (light cav), thracian auxilia cavalry (missile cav), thessalian cavalry (heavy cav)"