"lore-friendly" is just a part of cancer. I'd add more words: "realistic", "survival", "canonical", "immersive". It is not about what exactly it is, but how it was done. If it is light saber, it would fit into the game just fine, if it looks like a piece of dwemer technology, but not a prop straight from star wars. If it is a race of equine humanoids, they should have a style like khajits and argonians, not like they were ripped from some cartoon for kids. Also, some vanilla things are crime against aesthetics, just look at skyrim scimitar. I think you got my point.
