I thought, as with Bibasis, to present better a few of the most straightforward propositions I made long ago for the Spartans with some icons (some of which clearly need to be improved).
Kleroi civ. bonus: Spartiate land allotments where helots lived and farmed. Also, their farmlands were among the most fertile. This would give more efficient fields (and could compensate for my proposal of removing their advanced agricultural tech).
Scytale civ. bonus: transposition cipher for communications, since 7th c. BC, often associated with the Spartans, although it's somewhat controversial. This would increase FOV, to compensate for a civ that shouldn't be fast (lack of cavalry).
Murex Fishing tech: instead of Fishing Nets (which have existed for thousands of years!). The Greeks were not that big in fishing, much less the Spartans, while "the murex mollusc" was used to obtain "royal purple", and "among the Greeks the Lakonians and Tarentines were leading producers". This would make fishing boats give some additional metal coin.
Bribe Gerontes tech: something that Spartan kings did. If there are structure abilities with a cooldown, it would work better as such. This would make Heroes a bit more powerful, for a metal coin price.
I ran out of free AI images when trying to make a Cleomenes III Reforms tech icon, but I wasn't having good ideas on how to represent that in a simple way anyway.