This is definitely one of the best open source RPG game modes I've ever seen, it has literally everything I'll expect to find in a proper RPG game mode and some other cool features as well. A big plus for the nice looking code and open source concept, I'm not an expert in Lua myself, but had no problem at all to quickly understand how everything works.
The optimization is great, with minimal usage of system resources per player. The only disadvantage as I see it is the installation process which is kind of complex for newbies, especially as it has to be setup manually. hopefully that'll be fixed in future versions. The installation guide is easy to follow tho. Keep it up.