Hippocrates, Khopesh Swordsman, Bogsveigir and Onager where added in AoMEE to fill gaps in those civilisations unit roster but they filled those gaps too well. They basically made the civilisations play too similar.
But I still think they are kinda missing in AoMR.
Hippocrates
I think a hero like him should be added to a Greek Minor god the same was the Argo is now unlocked by Aphrodite.
That would be a nice alternative to Apollos Temple of Healing so it should probably be in Heroic Age too.
I think the Argo should just be available to all the Greeks (with the other pantheons getting their own Hero ships too) and Hippocrates should be unlocked via technology instead.
Khopesh Swordsman
The Egyptians have one big gap in their Classical Age line up, a unit that counters Slinger.
The Spearman is really not good against Slingers especially ones with Electrum Bullets.
So my suggestion would be to bring back the Khopesh Swordsman but without bonus damage vs. Villagers and Caravans but instead with a decent pierce armour and low hack armour.
This way the Egyptians have a unit that can counter Slingers but is pretty much useless against any other units, including other Archers.
They don’t need to counter Turmae since they are already countered by Spearman thanks to having the Cavalry unity type now.
They would also be good against Peltasts though.
This addition would practically only impact Egyptian mirror matches.
Bogsveigir
Has already been added, they are just called Godi now.
Onager
Cheiroballista fall of a lot in late game. Arcus just outclass them in practically every way.
Since they are officially siege units I think they should behave a little more like Siege units.
What if they would get +1 Crush Damage per Projectile in Mythical Age. It could be though the Engineers, Burning Pitch or though the Champion Ranged soldiers technology.
This way they would be stronger vs. Buildings and Ships without being stronger vs. Infantry, Cavalry and Archers.
This way they would become a more interesting option in late game and not just a worse version of Arcus.
This way the Atlanteans would basically have a worse version of the Norse Ballista, but still better then nothing.