You are not recreating L2 in Unity. You are recreating the MAPS.
What you are doing is PoC and will remain unfished forever, and simply because recreating Lineage 2 is much more than importing / improving maps in Unity.
Think of client side code, networking, game data, effects, sounds which is truly A LOT, trust me.
To do all this in Unity will require an enormous man-hour waste to script, with probably inferior performance to the good old native L2 binaries.
I will not even discuss about incompatibility with L2J/L2OFF networking, you will also have to remake the server because scripting the current networking would be a dumb idea on such a project.
Overall, yeah nice effort / graphics.