To be clear, renaming both "slingers" and "peltasts" to just "psilos", as in the Cernel variant, is more than just a rename, as it implies to refactor the xml to have only one of these two. Also totally removing the barbarian, as I intend to do at my next release (that I'll try to get done fairly soon, as I'm certainly happy to import those skin changes), would imply a similar work.
On top of that that that would require cutting two units out of the legend in bottom left, that would look a bit strange with the current format, as you would remain with only 1 unit entry in the fourth column of it.
Going back to changes, I'm not sure it is possible doing any gameplay changes at all to 270BC, as it looks to me that really nobody likes, or at least plays, this game, at least when I'm online. I don't remember the last time I saw anyone playing 270BC in lobby, and I'm pretty sure I've not seen any known experienced players playing it for many years, by now, since me and ice stopped.
EDIT: Also me and ice (and actually many good players (soulfein, ajmdemen, guerrilla_J...) played the version before Veqryn did any changes, that, if I recall correctly was the 1.3.1 (Elephants 4/4 no support, etc.). Then, after Veqryn (and me, but in a minor role) did the changes, I don't think the new (now old) versions, after 1.3.1 were ever seriously playtested by any experienced players at all. On the side of ice, he mostly stopped caring about 270BC because he got his Rome Total War map done. Then, eventually, I got my variants done; so from them on really 270BC was not played by anyone known at all (unless I'm missing something).