RTF is a global modification that replaces all towns in the game.

Yes! Moreover, you can approach it from this angle, or, conversely, immediately introduce some very powerful and unconventional axioms into the world and build upon them. For example, like in Enroth, with the multiplicity of worlds and all that (in fact, you could take a world within the same universe as Enroth, but a different planet, as a suggestion).