Beauteful pictures Dizz, I wonder if the humans that went there didn't want to interfer too much to the science tec. level of the planet or were they just total bonkers for old architecture and weapons? lol
Humans didn't have a "prime directive" so the rules were up to the leader of each expedition that ended up there. They did have a lot of influence on art, architecture, science, and technology so it is not a pure, uncorrupted society.
Okay maybe I'm looking too deep here but did you mean to have swords from two very different time eras? In the fourth panel you have what looks similar to an English long sword, and in the sixth you have a Roman Gladius.
And Unity's swords are Japanese katanas. This planet has been bombarded by over 100 years of human visitors with no set rules other than common sense. You wouldn't teach a less developed society how to build a nuclear weapon, but some might show them how to build a better sword.
The remainder of the Dalai, on the other hand, are purists that rejected human technology and their swords have more curvature like a kopis or a sosun pattah. (see title image at top of page)