Cassibellane, I have a hard time understanding what your argument is there.
The reason the Koinon Hellenon is in is because the Athenian-Spartan alliance, with Ptolemaic backing, quite legitimately hoped to defeat the Antigonids and reverse the authority of Makedonia among the Greek cities. It is not a story of spent states cobbled together, as if we invented their Koinon. As I've said before, the Achaians are out of our timeframe, and the Aitolians are "faction-locked" so to speak. I'm not sure what the questions about Baktria and Pahlava mean, but those are two clearly legitimate factions.
Re: Barbarians - the views of vpapako are largely the sort of thing that EB was started to address. The "barbarians" didn't look at a wall and stare with glassy eyes, they didn't build their towns of sticks, wattle and daub, and their own feces. Mining and counter-mining are not rudimentary endeavors. Their greatest weakness was in siege machine engineering, which was a weakness for most non-Greek peoples who didn't get Greeks to build machines for them. Just sayin. And yes, central Iberian peoples were building small towns and hillforts with stone walls prior to 272, though the oppida phenomenon doesn't hit full stride across the La Tene world until a century afterwards. That doesn't mean that early forms of large scale defense weren't already in use in isolated cases.
Re: Hoplites - the nature of Iphikratid hoplite-peltasts is very much up for debate, but you do realize Vpapako, that we have them in EB1, right? Additionally, I suppose you're not aware of our various non-traditional hoplite units, nor of the numerous sources corroborating the persistence of more traditional hoplite phalanxes well into the time period covered by EB. The Spartans experimented with a pike phalanx, but not until the late 3rd century, fifty years after our start date.
Vpapako, I think you've gotten a rather direct response from Bobbin because you're claiming to speak with a good bit of authority. The way you're using language is as if you're dispensing truth, not engaging in discussion. It's probably a language thing (i'm guessing you're Greek, as opposed to a Classicist).