That’s very helpful in letting us know what you’re trying to do, thanks.
The first thing I’d suggest is that you look at Neverwinter Nights, which seems to be almost identical except for the fact that it has fancy graphics instead of primitives, and that the transfer from server to server is less integrated.
In terms of a game, I cannot stress how much better off you would be actually inventing a single game rather than trying to create CubeWorld as a world/toolkit. Your observations about strikenet were good - it’s a very bad idea to try and “just make a world where people can do anything” (it tends to be incredibly boring, and you’ll never finish the project - this has happened to very many people already!). But then, instead of taking the wisdom from that, you seem to be about to make some of the same mistakes again?
Or, to put it another way, you are not trying to write a game - CubeWorld is a toolkit, not a game. There is no “fun” and there is nothing to do. This is fine - so long as you don’t delude yourself into thinking that you are writing a game when you are not. I would suggest you consider making an MMOG with some fun gameplay first…