I think, there is only one reason when a unit has to be 'rebalanced':
When every single successful army uses that unit.
Then it is obviously too powerful and should be tuned down somehow.
If there is a way to beat an army using a 'too powerful' unit without using that unit as well - NO PROBLEM!
If we want to have 'good' units, then there must be 'bad' units. It's all relative. And I prefer to play with 'good' units rather than average units.
I think, finding out what units are better than average is an important part of this game, so please dont balance too much.
When every single successful army uses that unit.
Then it is obviously too powerful and should be tuned down somehow.
If there is a way to beat an army using a 'too powerful' unit without using that unit as well - NO PROBLEM!
If we want to have 'good' units, then there must be 'bad' units. It's all relative. And I prefer to play with 'good' units rather than average units.
I think, finding out what units are better than average is an important part of this game, so please dont balance too much.