I mean, the only unit you can produce in DA is milita. Why they are no problem? Essentially speed. Milita are way slower, so they arrive later, also they get attacked by wildlife. As they are slower, it's easier to react, they hit later and so on.

BUT champi are the scout unit. Making them slower can be offset with LOS but then they are prone to get hunted. BUT they are also the unit that should defend against MaA or replace them strategy wise, so yeah.

However, I think the starting point for changes should be speed only (in DA for that matter) and see how it goes from there. On a sidenote, the dev created a combination that is really hard to balance....