I'm not saying that roguelikes is "just" permadeath. I'm saying that this is the main game feature that is shared by roguelikes and FTL. And randomly generated

I'm not saying that roguelikes is "just" permadeath. I'm saying that this is the main game feature that is shared by roguelikes and FTL. And randomly generated game world is so common that it can't even be considered as some unique roguelike feature.