I've struggled to understand Kolkhis, this faction has been in DEI for years now but has very little content. The vast majority of their roster are generic Greek units available to all Greek factions, their only interesting unique unit is a heavy cavalry that can only be used as a bodyguard and can't actually be recruited. Both of their unique hoplites are supplanted by a generic Greek hoplite that is better. Geographically they are a one city start in an unwalled coastal city surrounded by powerful hostile land army factions in, Hayk, Royal Scythia, Galatia, and the Seleucids as well as dangerous naval powers like Galatia, Bosporus, and Odrysia. To put it bluntly, this faction has nothing to offer and there is no reason to play it.
Compare this to a similar faction, Kartli, which starts just next door: insulated walled city start, unique textures for their units, cataphract bodyguards, super heavy cataphract lancers, and Armazis Dacva, a leading contender for best melee infantry in DEI.
So, will Kolkhis have its day where it receives an expansion similar to Atropatkan's recent rise to glory? Kolkhis sits on the crossroads between the Hellenic, Persian, and Scythian worlds, I see great potential for a varied and unique roster.