There is no proof whatsoever that the events narrated in the epics of Homer ever truly occurred. Excavation discoveries have only provided indications that the contents and protagonists of the Iliad could have been possibly been inspired, at a limited extent, from real historical events. Let's keep in mind that the author of these stories was not a contemporary, but instead lived several centuries after the Mycenaean civilisation had collapsed and disintegrated. This is why professional archeologists use the information included in the Iliad to reconstruct the society, warfare, economy, administration and etc. of the 9th and 8th centuries B.C.. For instance,
penteconters did not actually exist in the 2nd millennia B.C., but they were instead constructed only in the Archaic or perhaps Geometric Age (Homer mentions Οdysseus' ship as carrying 50 passengers, with their officers and king included). After all, the word does not belong to Mycenaean Greek.
By the way, since we're debating the merits of accuracy, the correct spelling is Iliad and not
Hilliad, which is just a satirical poem composed by a snarky British botanist. The first vowel of the Greek word
Ἰλιάς is written with a smooth and not a rough breathing, which means that the "H" is completely redundant. To give two similar and relevant examples, Odysseus (
Ὀδυσσεύς) is also written with a smooth breathing, but Homer (
Ὅμηρος) takes a rough one, hence why an "H" has been added to the Latin alphabet version. These nuanced diacritical marks have completely vanished in the modern Greek language, which explains why such spelling mistakes are so common.
Personally I was never fan of these huge Rome II settlements. They clogged the already narrow map and essentially guaranteed that sieges will represent the majority of settlements as armies hop from one gigantic city to the next. As for the cavalry, it had no place in Bronze Age warfare, as neither the appropriate equipment was available nor were horses big enough to support a rider and his armour. Implementing cavalry would be even more inaccurate than Achilles' shiny helmet, in my opinion, but if you're interested in Thrace, I suspect that a Rhesus DLC focusing on northern Balkans has quite lots of chances, depending on the success of the tent-pole game.