I hope this doesn't go out of control again

but here my opinion:
I think we all agree in that ancient history is extremely blurry. So ancient history is (and was even back than!) most often than not a matter of interpretation. Original sources are almost inexistent and most sources we have were written hundreds of years after. Not to mention that history is written by the victor, especially during those ancient times of non-wikipedia citizens ^^ What I want to say is that propaganda must have been a major part of any ancient papyrus, oral storytelling and actual parades. This should be clear, so enough of this for now...
About the Hastati wearing spears, gladi, pilum, lorica hamata and being organized in maniples and cohorts:
Depending on the sources we have it is possible that in 272 BC the legions would have been the same as in 107 BC. Sources state that allied legions were deployed in cohorts. Sources state also that legions in spain were deployed in cohorts as well. It is also said (and archeologically proven) that legionnaires already knew the gladius hispaniensis, the lorica hamata and the pilum during the first punic war. It is however not very likely that the Roman army of 272 BC was the same like in 107 BC. Romans usually linked reforms to the one great reformer, however it is more likely that the army evolved over time and this very gradually.
Let's look at this. The early roman army is said to be a Greek-style phalanx army of hoplites. Apparently their Samnite counterparts had a much better tactical organization which the Romans eventually must have copied: The maniples. Most likely the first manipular organization must have been made of hoplites. Since the smaller tactical units, needed to act independently of each other and not fight in that massive phalanx battleline protection was crucial and reliability on teamwork within the phalanx battleline broke gradually. Hence it is very likely that the better shaped and protective scutum was gradually becoming the new shield to chose for a manipular organization. This might have been the first Hastati = Spear and Scutum. Now, when the Romans fought against the Carthaginians who wore the superior gladius hispaniensis, they must have had a hard time, hence the necessity to adapt the gladius. However it is most likely that the Romans did not abandon their spears at first place and it is most likely that the legions who did not fought in spain would have been using the italic gladius (shorter version) at first place. Hence, we have the next evolution of hastati = spear as primary weapon, italic gladius (sometimes looted gladius hispaniensis as secondary weapon and pilum). I can imagine that the versatility of this new army with spear, gladius and pilum would have been very effective for a long time. It is not likely though that the Romans adapted the chain-mail, since it was very expensive. Most likely only the richest first class citizens were able to equip them. It is most likely that the next struggle for Rome came in the 2nd Punic War fighting against the Carthaginians again. Apparently the Romans struggled and lost many of their initial battles. Since many of the high class citizens died (e.g. Cannae) the Roman Senate had to lower the prerequisites to enter the Roman army and initiated the first proletarisation. Since, low class citizens (proletarii) had no funds to get their equipment the state would assume the role to equip the army in a standardized way. Hence it is very likely that this is the first time when the roman army became a standardized army, e.g. the introduction of the gladius hispaniensis, replacing the italian shorter version AND the Hastae (spear) once and for all in all maniples. Furthermore it is very likely that with the appearance of gallic mercenaries with chain-mail and the conquest of the cisalpine (access to the finest ore = Ferrum Noricum) the Romans began to introduce the chain-mail as standardized equipment for all roman soldiers forming the feared republican army that might have lasted until 107 BC without any major changes anymore. We do also not know of any struggles during this time period against any foe, so change of equipment or tactics might have been abolished, the only struggle the romans had was replacing the fallen, hence a demographic problem which they solved with the 2. and finally the 3. proletarization of the roman army (Marian Reforms).
Hence it is not even strange that in 272 BC the Romans did wear no chain-mail and no gladius hispaniensis. I would even say that until the middle of the 2nd Punic War they still didn't had those equipments as standardized for their army, but the struggle of the 2nd Punic War to be the initiator of those standardized gradual reforms.
One might disagree, but I have also to say gameplay wise it is much more interesting to have gradual reforms. I would be disappointed if we would have gotten stripped of one reform for the sake of historic accuracy (which in this case is so controvers that there are more than one historic accuracy here).
Hope this helps
