Fair. My thought was having production at the barracks. The point is that cavalry were not from Sparta itself, and having irregular troops produced at the barracks would help communicate that.
I'd also agree that Agis IV is a poor choice. I like Cleomenes III as a hero, but I think a problem is that it doesn't coincide with Spartan hegemony. Introducing him would be interesting, however.
Lysander would be an intriguing option to explore, and kind of leads into the idea of Spartan naval gameplay involving acquiring Persian warships.
I have a soft spot personally for Agesilaus II, who I think led a fascinating life and was responsible for the only effectual Spartan cavalry force.
I assume this refers to the fact that Sparta had two kings. Personally I like that sort of idea, but only if the heroes in game were generic. As is, Brasidas not being a king makes the whole idea kind of problematic. Also, it kind of runs into the point that by that perspective Romans should have two heroes to model their consular government. It's a slippery slope that I think the hero system is not designed to model. The key problem with that is the need to introduce more heroes to those factions (in my opinion) to make that idea function, which would necessitate even more work.
Good to know.