The dalcian falx is hardly near the greatsword we have.
The greatsword we have ingame isn't anything, really. It's a giant, awkwardly shaped, two handed club. A chair leg would be a more effective weapon, if the laws of physics worked in Tamriel anything like they do on our Earth. Granted, the swords TES series has are on the smaller and lighter end of the scale you tend to see in games.
And while two-handed sword existed and were tested, they were never kept.
Not much in history is ever "kept" in general. That's kind of the point. Things change. These weapons were effective for their time, and were discarded when they became ineffective. The Romans issued arm armor (Manica) for their troops when fighting Dacians for a reason.
The only remarkable weapons were roman pilum & shield + spata to finish fallen soldiers, greek hoplites' dory, english longbows and swiss halberds.
"The only remarkable weapons"? What the hell does that even mean? No other weapons in nearly 6000 years of recorded history were noteworthy? Besides, since this seems to have devolved into Internet slapfight over minutia, Rome wasn't built with Spatha. During most of the expansion of Rome, the legionaries used
Gladius Hispaniensis or it's variants. Spatha only came to widespread use during the 2nd and 3rd centuries CE. And it was originally a cavalry weapon anyway.
And no, there's no way for a woman not to have visible changes when becoming warrior-strong. Dream on.
I've seen fit women in real life, TYVM. Of course they look nothing like the females in Skyrim. All the NPCs and the player use the same body, so it has to fit every possible type of character. That's why it's an average, if a thin, looking body, and not a gym bunny. That's a design decision that has nothing to do with your character's strength or lack of it. My point is not that you don't get physical changes when building strength, my point is that it depends on the individual what those changes end up looking like on the outside. And, we don't get shown those changes, since the game has a one-size-fits-all body, for technical reasons.