I'm totally NOT a historian, so I can only answer #3
The KH gets makedonian-like units after the "march of time", which is the new name for the vanilla marian reform. You get it when a huge city is built in Italy.
Yes, it doesn't make much sense, but I think it's hardcoded. At least the way you obtain the "march of time"... I don't know why the EB team decided to use it for some "reforms" though, IMHO scripted reforms are waaay better.
Actually, I'm curious about the reason that lead to this decision... not criticizing, I'm just curious.
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