Surprisingly bad units

[QuintusSertorius]

They are as swift and agile as Prodromoi, but at the same time better armoured.

Not even is this a contradiction in terms, but it's simply untrue. Heavier armour is why they're both slower, and have less stamina. And by the way, we've been talking about the Thrakian Prodromoi throughout, not the regular Hellenistic ones (which aren't as good).