Luanti had an annoying habit of regenerating terrain while I was still walking on it. In my book it is very much still "minecraft but worse." I was on a very weak ARM device though.
Regenerating? Luanti doesn't ever regenerate terrain. Do you mean generating the first time? Or loading? I've had it happen that I run into the edge of the mapblock and can't walk into the next one because it's loading or still generating. Maybe give it another chance, because I can't picture the behavior you're describing.