[Kjeld]

I'd dare to say that there are few balance problems with individual units. Any of the nation specific "elite" unites have their uses, even if some of them are very situational and/or require additional support and/or appropriate blessings.

My biggest gripe is that in most (if not all) cases, wherever there is a "light" and a "heavy" unit of comparable quality and availability, it is better to build the heavier unit, period. This is largely due to the fact that the difference in cost between the light unit and its heavy counterpart is ressources, not gold, and it is the gold that ultimately matters. This is more of a general problem than a problem with specific units. Why build velites when you can build principes or alae legionaires, why build cardaces, why build unarmored satyrs, etc ...