Reinventing the wheel is an exercise of frustration.

Someone who has the knowledge to do that would be making better use of the time invested on that to make a proper game.

While it seem like “few things”, to get the present Conan Exiles to do that in a fashionable way require the design and code of underlying systems the game does not have.

To accomplish that, you will be dealing with changing the core functionalities of the game, and therefore, you are way more efficiently using that time by downloading Unreal Engine 5, getting the sample project for the 3rd person sandbox game, and using the marketplace for the art assets there are not in the list, if you are not making your own, which is kinda easy with Unreal Engine 5.

Why that is sure the case ?

There are many things in the game that mods cannot change without going way up the hierarchy, if not creating their own actors, because the core game functions “to be changed” are embedded in code not accessible by the devkit, so you cant replace the system using a mod, you can only add another system on top of it, and work your way tap the core game system and infect it with yours like virus. But you cannot “get rid of it”.

If it was a time efficient work, the people behind mods like AoC or other big mods would have fixed/revamped basic systems in the game they themselves have to contend with.