Here's some notes I scribbled down while looking through the tags (some of it is redundant with yours and Jenova's reports):
.256 tags
zerk idle sprites are different
main interface/dialogs are way different
"king of the hill" level is I'll Dance On Your Grave/Spiderweb (not sure which)
"landscape" level - I don't recognise this map. But there are colormaps and shadowmap in there; perhaps someone would like to turn it into a real working map? Perhaps some veteran hexeditor from the Good Ol' Days could decipher the differences in the mesh format (if any) and garner unit placement info from there.
water was apparently implemented by having all water areas on a colormaps textured a certain shade of blue (cyan?), which was then retextured with a special "water" texture at runtime, and rendered from there.
BINA
Metaserver config info is there. Could you run different (non-bnet) metaservers in the days of yore?
Quit Dialog: "Do you really want to abandon your forces?"
MELI tag called "grassland". What's MELI?
REVA tag called "water". What's REVA?
MESH tags "king of the hill" and "landscape"
SOUN tags - only sounds are dwarf explosive sounds
STLI tags
Wight flavor "The Dwarves before Stoneheim" instead of "The Dwarves before Myrgard"
Warrior flavor: "After the armies of the Great Southern Kingdom were finally broken at Juniper, the surviving soldiers scattered among the free cities of the North, taking their arms with them."
Note the Great Southern Kingdom instead of the Province, and Juniper instead of Covenant.
Shade names: Gullveig, Falerina, Morgana, Medea, Circe, Amalthaea, Sycorax, Allison Gross, Grimhild, Louhi, Mazzarin, Nym, Morante, Andred, Damas (!!!), Phelot, Turquine, Herod, Cormorant, Sciron, Sinis, Sacripant, Galar, Black Annis, Cailleac Bheur
Myrmidon flavors:
"During the Wind Age the combined armies of the dark cowered before the feared warrior race of the Myrmidons, but desirous of power and immortality they betrayed the light on the Plains of Tyr and joined Ashfear."
All-new flavor - note the Plains of Tyr (not on map) and Ashfear instead of Balor.
"When still flesh and blood, the Myrmidons were most vain about their long hair and colorful body paint, often choosing not to sleep on the eve of battle in order to make ready for the next morning’s fighting."
Slightly different from release version
"Flesh now held to their bones by bandages alone and hair having rotted out long ago, the Myrmidon’s have set aside their combs and pigments in favor of whetstones, and now devote the same care to honing their wicked knives."
All-new flavor.
Journeyman flavors:
"Told of the rearguard at Bagrada in 1158: “Not a palm’s breadth free of wounds on his body, Five Moon Heron knelt to kiss the earth, and drawing strength from her rose to charge the thickest gathering of the enemy."
We have a date! But when was this, relative to current events? Before the fall of Muirthemne, when the Herons were absent and the Fallen sacked the Empire? Then that would make the current date (as of Chimera) around 1380 (1158 plus 50 years till TFL plus 60 years till M2 plus 10 years till Chimera). Also, isn't it Five Motion Bloody Jaguar in the release?
“Returning to the ruin Llancarfan had become in their absence, the emperor’s deathless Heron Guards each tore nine gold tiles from the palace wall, every one the weight of a grown man ... ”
Llancarfan instead of Muirthemne.
“ ... and hanging these heavy plates about their neck in penance for being absent when most needed, the Guard disbanded, each of the hundred choosing a different path into the waste.”
All-new flavor. Note "each of the hundred". Only 100 Herons?
fir'Bolg were called fir'Bolgs (yes, with the 's'), not "archers".
Dwarf flavors:
“The early dwarvish eddas always speak of heroes ‘having gone north into the mountains to slay Ghôls’, but most repeated is tale of Dvalin son of Alfrigg, third ephor of Stoneheim ...”
Note Dwarvish instead of Dwarven
“Hours after the fall of Stoneheim, the dwarves defending Myrgard collapsed the barbican, entombing ten thousand of their number behind as many tons of shattered rock.”
Stoneheim and Myrgard reversed again.
Avatara names: Caliban, Malagigi, Cu Roi, Forgall Manach, Hreidmar, Enkidu, Tfear (!!!), Fei Llawn, Cu Chulain, Diarmuid, Maeldun, Gilgamesh (!!!), Roland (!!!), Beowulf (!!!). Subtract Tfear, Gilgamesh, Roland, and Beowulf - all of which seem rather out of place - and you've got 11 names, not nine. Caliban is Alric, according to Josh Noel (a beta tester and former Myth's Story Page maintainer), and we know Cu Roi and Maeldun are members of The Nine, then there's also Rabican and Murgen - there's the five we know. Which, if any, of these names, are names of the other four Nine? I would but on Cu Chulain, just because of the similarity to Cu Roi, but the others?
UNIT
"warrior queen's guard" - queen who?
"soulless (deceiver fist one)" - yes, it says "fist", not "first"
"journeyman (ce acetal)" - that's remakably similar to "the acit el calendar" mentioned in the GURPS Myth Table of Contents. Any idea what it might mean?
"fir'bolg (palace guards, left)" - whose palace?
