It was not a "knock-off." Many cultures and styles used in the Elder Scrolls are based off of real cultures that existed in the past. Rome was a strong influence for the Imperials, England for High Rock, Mesopatamia for the Dwemer, and so on.
That doesn't stop it from being a knockoff, those other cultures are knockoffs too, except the Dwemer, because I'm fairly certain Mesopotamians never made robots
Like most other fantasy settings, many aspects of the Elder Scrolls are based very heavily on real world cultures, mythology, or past works of fantasy, Morrowind just did a better jo at concealing it than most fantasy games.
i wonder why Beth didnt have them in Oblivion instead of that generic fantasy armor.
Because Oblivion is as a whole generic fantasy, where as Morrowind tries to be creative in many places.
The Imperial Legion in Morrowind didn't seem particularly creative, though, that was one of the less creative areas of the game.
Of course most of the people on this forum grew up on Morrowind first, so they think that The Elder Scrolls Series is supposed to be a carbon copy of Morrowind. Believe it or not, things were different before you came along.
I came along with Morrowind, however, when I played Daggerfall (which I should add, I liked, but not for its environments.) my belief that all of the Elder Scrolls world was as creative as Morrowind, but that doesn't change the fact that in many ways, Morrowind represents what I hope to see in the future of the series, that doesn't mean I want every Elder Scrolls game to be the same as Morrowind, I would hardly say that, for why should Cyrodiil look like a volcanic island far to its east? Rather, I want to see Bethesda keep the same quality of artistic design in future games, I want each new game to show me something new, not just something I've already seen dozens of times in other works of fantasy. And with Oblivion, Bethesda had a much more interesting view of Cyrodiil already presented in the Pocket Guide, yet instead of using that, they changed it into Generic Fantasy Land. Some would argue that the Elder Scrolls world was like this back in Arena and Daggerfall, that doesn't mean we should go back to it. Sequels should bring a game forward, not take steps back, sometimes, that means refining the setting as well as gameplay.