A tip for more general world building.
In order to craft a truly interesting world, or even aspect of your world, you need to treat it exactly the same way you would a story in and of itself.
A story has 3 parts, and these 3 parts are in this order of importance.
1. Character
2. Structure
3. Theme
You want to first focus on crafting some character into your world. On a world scale, this means more of the composite of the character of all the nations in your world. This would include how they approach things like daily life, how their ruling class makes life for the citizenry, how war-like or peace-loving the people of this world are, and how humanitarian/inhumane the people of this world are.
In terms of structure, this would be the actual political structures of your world and the actual way legal systems are set up. The impact laws and political systems have on your citizenry is character, but the actual details on how these systems are set up is structure. The gods and other forces can also be part of the structure, as can the system for your liteRPG theme. And, once again, these follow the same rule as the legal system. The details of the system itself are structure, and the impact it has on the people is character. The character aspects of these things are more important than the structure, but the structure is important as well.
Theme would be something that ties all the character and structure in the story together to deliver a bigger message. This takes some skill to pull off, and can be a little difficult. It is also unnecessary. Your story can stand on it's own while completely ignoring theme. However, if you actually do go that extra mile and work some theme into your story, it can give it that little bit of extra oomph that will really help it resonate with the readers. So, it is definitely something to think about.
Theme tends to be allegorical. In the case of a liteRPG world, a common theme a lot of people go with is that the liteRPG system represents some kind of soulless beaurocratic "system" like a national government that doesn't care about it's citizens and will grind them into dust. If this is the theme, then the structure and character of the system, as well as several story-lines in the writing itself, will be set up to reflect this theme.
In the story I mentioned in my first post, I am going with a theme of how the system, which the previous story's MC created, has a way of sweeping up a person and turning them into something they hate, and it will even do this to the very person who created the system in the first place. In this way, I actually turn the protagonist of the first story into the tragic villain of the 2nd story.